Active Servers
- AU ntp.saard.net (203.21.37.18)
Location: The University of Adelaide, Adelaide, South AUSTRALIA
Synchronization: NTP secondary (stratum 2), DEC 3000/300L OSF/1
Service Area: AARNet
Access Policy: open access
Contact: Lachlan Cameron Smith (lachlan.cameronsmith@adelaide.edu.au) - AR tick.nap.com.ar (200.49.40.1)
Location: Network Access Point, Buenos Aires, Argentina
Synchronization: NTP V3 secondary (stratum 2), Cisco IOS
Service Area: Argentina
Access Policy: open access, please send a message to notify
Contact: Pablo J. Fritz (timekeeper2002@nap.com.ar)
Note: tick.nap.com.ar is a CNAME - AR time.sinectis.com.ar (216.244.192.3)
Location: Sinectis S.A., Buenos Aires (Argentina)
Geographic Coordinates: 3432'S, 5820'W
Service Area: Argentina
Synchronization: NTP V3 secondary (stratum 2), i686/Linux
Access Policy: open access, please send a message to notify.
Contact: timekeeper@sinectis.com.ar
Note: time is an alias and the IP address may change, please use DNS. - AR tock.nap.com.ar (200.49.40.15)
Location: Network Access Point, Buenos Aires, Argentina
Synchronization: NTP V3 secondary (stratum 2), Cisco IOS
Service Area: Argentina
Access Policy: open access, please send a message to notify
Contact: Pablo J. Fritz (timekeeper2002@nap.com.ar)
Note: tock.nap.com.ar is a CNAME - BE ntp1.belbone.be (195.13.23.5)
Location: Brussels, Belgium
Synchronization: xntpd (stratum 2), linux/unix
Service Area: European Union
Access Policy: open access
Contact: Belbone NOC (timemaster@belbone.be) - BE ntp2.belbone.be (195.13.1.153)
Location: Brussels, Belgium
Synchronization: xntpd (stratum 2), linux/unix
Service Area: European Union
Access Policy: open access
Contact: Belbone NOC (timemaster@belbone.be) - BR ntp.cais.rnp.br (200.144.121.33)
Location: RNP - Brazilian Research Network/Rede Nacional de Pesquisa
Synchronization: NTP V4 Secondary (stratum 2), FreeBSD/UNIX
Service Area: Brazil
Access Policy: Open access to stratum 2 and stratum 3 NTP servers. Please, send a mail to notify.
Contact: ntp-admin at cais.rnp.br
- BR ntp.hiway.com.br (200.246.53.5)
Location: Brazil, SP, Valinhos (near Sao Paulo) Hiway Internet Provider Valinhos
Geographic Coordinates: 22:58:22.4S 47:00:19.7W / Alt +729m (GPS WGS84)
Synchronization: NTP V4 Secondary (stratum 2), Linux i586, NTPd v.4.1.71
Service Area: Brazil
Access Policy: Open access. Please, send a mail to notify.
Contact: Fernando Braghetto, webmaster@hiway.com.br, 55 19 38694300
Note: IP address are subject to change; use DNS - BR ntp.massayonet.com.br (200.254.135.2)
Location: Telemacro Sistemas e Serviços
Synchronization: NTP V4 Secondary (stratum 2), OpenBSD 3.4
Service Area: Brazil
Access Policy: Open access to stratum 2 and stratum 3 NTP servers. Please send a mail to notify
Contact: ntp@massayonet.com.br - BR ntp.pop-pr.rnp.br (200.19.74.21) (2001:12f0:100:1::2)
Location: PoP-PR/Brazilian Research Network (RNP)
Synchronization: NTP V4 Secondary (stratum 2), IBM RS6000 - 43P-240 /Debian GNU Linux with IPv6 Support
Service Area: Brazil
Access Policy: Open access to stratum 3 server. Please, send a mail to notify.
Contact: ntp-admin@pop-pr.rnp.br - BR ntp.ufes.br (200.137.65.132)
Location: POP-ES Federal University of Espirito Santo / POP-ES
Universidade Federal do Espirito Santo (UFES)
Synchronization: NTP V4 Secondary (stratum 2), AIX 4
Service Area: Brazil
Access Policy: Open access to stratum 2 and stratum 3 NTP servers. Please, send a mail to notify.
Contact: ntp-admin@ufes.br - BR ntp1.pucpr.br (200.192.112.8)
Location: Brazilian / Pontificia Universidade Catolica do Parana
Synchronization: NTP V4 secondary (stratum 2),
Sun SPARC4/Solaris 7
Service =C1rea: Brazil
Access Policy:open access to stratum 2 server
Contact: ntp1@pucpr.br - CA ntp.cpsc.ucalgary.ca (136.159.2.2)
Location: University of Calgary, Calgary, Alberta, Canada
Synchronization: NTP V4 Secondary, i686/Solaris
Service Area: Canada
Access Policy: open access
Contact: Brad Arlt (timekeeper@cpsc.ucalgary.ca) - CA ntp1.cmc.ec.gc.ca
Location: Canadian Meteorological Centre, Dorval, Québec, Canada
Synchronization: NTP V4 secondary SGI/Unix
Service Area: Eastern Canada
Access Policy: open access
Contact: ( ntp-admin@cmc.ec.gc.ca) - CA ntp2.cmc.ec.gc.ca
Location: Canadian Meteorological Centre, Dorval, Québec, Canada
Synchronization: NTP V4 secondary SGI/Unix
Service Area: Eastern Canada
Access Policy: open access
Contact: ( ntp-admin@cmc.ec.gc.ca) - CA tick.utoronto.ca (128.100.103.252)
Location: University of Toronto, Toronto, Ontario, CANADA
Synchronization: NTP V3 secondary (stratum 2), Sparc 10, Solaris 2.5.1
Service Area: Eastern Canada
Access Policy: open access, send email to notify.
Contact: Russell Sutherland (russ@madhaus.cns.utoronto.ca)
Note: IP addresses are subject to change; please use DNS - CA time.chu.nrc.ca (209.87.233.53)
Location: National Research Council of Canada, Ottawa, Ontario, Canada
Geographic Coordinates: 45:17:41N, 75:45:27W
Synchronization: NTP V3 secondary (stratum 2), PC/Linux
Service Area: Canada
Access Policy: open access
Contact: time@nrc.ca
Note: IP address subject to change; please use DNS. - CA time.nrc.ca (132.246.168.148)
Location: National Research Council of Canada, Ottawa, Ontario, Canada
Geographic Coordinates: 45:27N, 75:37W
Synchronization: NTP V3 secondary (stratum 2), PC/Linux
Service Area: Canada
Access Policy: open access
Contact: time@nrc.ca
Note: time is an alias and the IP address may change; please use DNS. - CA timelord.uregina.ca (142.3.100.15)
Location: University of Regina, Regina, Saskatchewan, Canada
Geographic Coordinates: 50:25N , 104:35:20 W
Synchronization: NTP V3 secondary (stratum 2), Sun Sparc 5
Service Area: SASK#net, CA*net, Canada
Access Policy: open access
Contact: Mark Haidl (timekeeper@uregina.ca)
Note: please limit to one or two hosts per site. - CA tock.utoronto.ca (128.100.100.128)
Location: University of Toronto, Toronto, Ontario, CANADA
Synchronization: NTP V3 secondary (stratum 2), Sparc 5, Solaris 2.5
Service Area: Eastern Canada
Access Policy: open access, send email to notify.
Contact: Russell Sutherland (russ@madhaus.cns.utoronto.ca)
Note: IP addresses are subject to change; please use DNS - CZ ntp.cgi.cz (81.0.239.181)
Location: Prague, The Czech Republic
Synchronization: NTP V4 secondary (stratum 2), PC/FreebSD
Service Area: Czech Republic
Access Policy: open access
Contact: Jakub Chromy (helpdesk@cgi.cz)
Note: ntp is an alias and the IP address may change; please use DNS. - CZ ntp.globe.cz (81.95.96.3)
Location: Prague, The Czech Republic
Synchronization: NTP V4 secondary (stratum 2), PC/Linux
Service Area: Czech Republic
Access Policy: open access
Contact: Jan Panoch (panoch.jan@globe.cz)
Note: ntp is an alias and the IP address may change; please use DNS. - CZ ntp.karpo.cz (217.11.227.68)
Location: Prague, The Czech Republic
Synchronization: NTP V4 secondary (stratum 2), PC/Linux
Service Area: Czech Republic
Access Policy: open access
Contact: Karel Zvara (zvara@karpo.cz)
Note: ntp is an alias and the IP address may change; please use DNS. - CZ ntp1.contactel.cz (212.65.193.3)
Location: Prague, The Czech Republic
Synchronization: NTP V4 secondary (stratum 2), PC/Linux
Service Area: Czech Republic
Access Policy: open access
Contact: Contactel hostmasters (hostmaster@ctt.cz)
Note: ntp1.contactel.cz is an alias and the IP address may change; please use DNS. - CZ ntp2.contactel.cz (212.65.193.4)
Location: Prague, The Czech Republic
Synchronization: NTP V4 secondary (stratum 2), PC/Linux
Service Area: Czech Republic
Access Policy: open access
Contact: Contactel hostmasters (hostmaster@ctt.cz)
Note: ntp1.contactel.cz is an alias and the IP address may change; please use DNS. - DE tack.fh-augsburg.de (141.82.30.253)
Location: Augsburg University of Applied Sciences (FH), Augsburg, Bavaria, Germany
Synchronization: NTP V4 secondary (stratum 2), i486/Linux
Service area: Germany, Europe, European academic community
Access policy: please check the details at our website
Contact: Burkhard Erdlenbruch (erd@rz.fh-augsburg.de) - DE tick.fh-augsburg.de (141.82.30.251)
Location: Augsburg University of Applied Sciences (FH), Augsburg, Bavaria, Germany
Synchronization: NTP V3 secondary (stratum 2), i486/Linux
Service area: Germany, Europe, European academic community
Access policy: please check the details at our website
Contact: Burkhard Erdlenbruch (erd@rz.fh-augsburg.de) - DE tock.fh-augsburg.de (141.82.30.252)
Location: Augsburg University of Applied Sciences (FH), Augsburg, Bavaria, Germany
Synchronization: NTP V3 secondary (stratum 2), i486/Linux
Service area: Germany, Europe, European academic community
Access policy: please check the details at our website
Contact: Burkhard Erdlenbruch (erd@rz.fh-augsburg.de) - ES hora.oxixares.com [217.127.2.161]
Location: Ogijares (Granada/SPAIN)
Synchronization: ntp v4.1.1 secondary (stratum 2)/athlon XP 2500+/SuSE Linux 8.2
Service Area: Spain
Access Policy: Public (glad to receive a note)
Contact: timekeeper@oxixares.com - ES slug.ctv.es [194.179.52.14] (will add an alias for this purpose)
Location: Altea (Alicante/SPAIN)
Synchronization: Stratum-2/i486DX2/66/Linux
Service Area: Spain
Access Policy: Public (glad to receive a note)
Contact: Luis Colorado (luis.colorado@slug.ctv.es) - FI tick.keso.fi (194.137.39.67)
Location: Keski-Savon Oppimiskeskus, Pieksamaki, Finland, Europe
Synchronization: NTP-3, i686/Linux
Service area: Finland
Access policy: open access, please send a message to notify
Contact: root@keso.fi
Note: tick is an alias, please use DNS - FI tock.keso.fi (194.137.39.68)
Location: Keski-Savon Oppimiskeskus, Pieksamaki, Finland, Europe
Synchronization: NTP-3, i586/Linux
Service area: Finland
Access policy: open access, please send a message to notify
Contact: root@keso.fi
Note: tock is an alias, please use DNS - FR ntp.ndsoftwarenet.com
Location: NDSoftware, Paris, France
Synchronization: NTP secondary (stratum 2)
Service area: World
Access policy: open access, please send a message to notify
Contact: NDSoftware NTPmaster (ntpmaster@ndsoftwarenet.com)
Note: IP address subject to change; please use DNS. - FR ntp.obspm.fr
Location: BNM-SYRTE, Observatoire de Paris, Paris, France
Synchronization: NTP V4 secondary (stratum-2), i386/Linux
Service Area: France/Europe
Access Policy: open access, but please send a message to notify
Contact: info.bnm-syrte@obspm.fr, More Informations?
Note: use DNS for IP address. - FR ntp.tuxfamily.net
Location: SFINX or TeleHouse2, Paris, France
Synchronization: NTP V4 secondary (stratum-2), Debian GNU/Linux ix86
Service Area: France/Europe
Access Policy: open access, no need to notify
Contact: ntp-adm@tuxfamily.net, More Informations ?
Note: use DNS for IP address
Note: ntp.tuxfamily.net is an alias for ntp1.tuxfamily.net and ntp2.tuxfamily.net
Note: see ntp{1,2}.tuxfamily.net entries for more information
- FR ntp1.tuxfamily.net (80.67.177.2)
Location: SFINX, Paris, France
Synchronization: NTP V4 secondary (stratum-2), Debian GNU/Linux ix86
Service Area: France/Europe
Access Policy: open access, no need to notify
Contact: ntp-adm@tuxfamily.net, More Informations ?
Note: use DNS for IP address is recommended
Note: peer with ntp2.tuxfamily.net
Note: If you use this service reguraly, you should subscribe to ntp@tuxfamily.org
- FR ntp2.tuxfamily.net (80.67.179.2)
Location: TeleHouse2, Paris, France
Synchronization: NTP V4 secondary (stratum-2), Debian GNU/Linux ix86
Service Area: France/Europe
Access Policy: open access, no need to notify
Contact: ntp-adm@tuxfamily.net, More Informations ?
Note: use DNS for IP address is recommended
Note: peer with ntp1.tuxfamily.net
Note: If you use this service reguraly, you should subscribe to ntp@tuxfamily.org
- FR ntp.univ-lyon1.fr (134.214.100.6)
Location: CISM, Lyon, France
Synchronization: NTP V3 secondary (stratum 2), Sun SS10
Service Area: France, Switzerland, Italy, Europe
Access Policy: open access
Contact: ntp-adm@univ-lyon1.fr
Note: consult DNS to get host address, ntp is an alias.
Note: we would appreciate getting a little note if you make regular use of this server, so that we can put you on our NTP mailing-list. - FR ntp.via.ecp.fr (138.195.130.71)
Location: VIA, Ecole Centrale Paris, France
Synchronization: ntp v4.0.99c (stratum 2), Debian GNU/Linux x86
Service Area: France/Europe
Policy: open access, send email to notify. Please limit access to one or two hosts per site (large sites should set up their own ntp server)
Contact: ntpadmin@via.ecp.fr - GR ntp.mfa.gr (193.92.123.152)
Location: Athens, GR
Service Area: Greece
Synchronization: NTP V3 secondary (stratum 2), i686/FreeBSD
Access Policy: open access/GR, please send a message to notify.
Contact: ntp@mfa.gr
Note: "ntp" is an alias and the IP address may change, please use DNS. - GR ntp.mikros.com (213.5.174.2)
Location: Argostoli, Kefalonia, GR
Geographic Coordinates: 3810N 2030E
Service Area: Greece
Synchronization: NTP V3 secondary (stratum 2), i686/Linux
Access Policy: open access/GR, please send a message to notify.
Contact: ntp@mikroskosmos.com
Note: "ntp" is an alias and the IP address may change, please use DNS. - HK ntp.cuhk.edu.hk
Location: The Chinese University of Hong Kong.
Geographic Coordinates: 22:25:10N, 114:12:22E
Synchronization: NTP V3 secondary (stratum 2), i686/Linux
Service Area: Hong Kong, Taiwan, China, and South East Asia
Access Policy: open access
Contact: Connie Law (connieL@cuhk.edu.hk), <kinming@cuhk.edu.hk> Note: IP addresses are subject to change; please use DNS
- HR os.ntp.carnet.hr (161.53.200.8)
Location: CARNet (Croatian Academic and Research Network), Osijek, Croatia
Synchronization: NTP V4 secondary (stratum 2), Intel x86/Linux
Service Area: Croatia/Europe
Access Policy: open access, glad to receive a note
Contact: ntp@carnet.hr
Note: IP address subject to change; better use DNS - HR ri.ntp.carnet.hr (161.53.40.3)
Location: CARNet (Croatian Academic and Research Network), Rijeka, Croatia
Synchronization: NTP V4 secondary (stratum 2), Sun Sparc/UNIX
Service Area: Croatia/Europe
Access Policy: open access, glad to receive a note
Contact: ntp@carnet.hr
Note: IP address subject to change; better use DNS - HR st.ntp.carnet.hr (161.53.30.3)
Location: CARNet (Croatian Academic and Research Network), Split, Croatia
Synchronization: NTP V4 secondary (stratum 2), Sun Sparc/Solaris
Service Area: Croatia/Europe
Access Policy: open access, glad to receive a note
Contact: ntp@carnet.hr
Note: IP address subject to change; better use DNS - HR zg1.ntp.carnet.hr (161.53.2.108)
Location: CARNet (Croatian Academic and Research Network), Zagreb, Croatia
Synchronization: NTP V4 secondary (stratum 2), Sun Sparc/Solaris
Service Area: Croatia/Europe
Access Policy: open access, glad to receive a note
Contact: ntp@carnet.hr
Note: IP address subject to change; better use DNS - HR zg2.ntp.carnet.hr (161.53.160.4)
Location: CARNet (Croatian Academic and Research Network), Zagreb, Croatia
Synchronization: NTP V4 secondary (stratum 2), Intel x86/Linux
Service Area: Croatia/Europe
Access Policy: open access, glad to receive a note
Contact: ntp@carnet.hr
Note: IP address subject to change; better use DNS - HU time.kfki.hu (148.6.0.1)
Location: KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary
Synchronization: NTP secondary (stratum 2), Sun/Solaris
Service Area: HUNGARNET
Access Policy: open access, send email to notify.
Contact: time@sunserv.kfki.hu - ID ntp.incaf.net (202.180.0.71)
Location: Jakarta, Indonesia
Synchronization: NTP V4 Secondary, i686/Linux
Service Area: Indonesia
Access Policy: open access
Contact: admin (timekeeper@incaf.net) - IE ntp.maths.tcd.ie
Location: School of Mathematics, Trinity College, Dublin, Ireland.
Synchronization: NTPV4 secondary (stratum 2), Intel, FreeBSD 2.2
Service Area: Ireland, UK
Access Policy: open access, please send a message to notify.
Contact: time@maths.tcd.ie
Note: ntp.cs.tcd.ie, ntp.maths.tcd.ie and ntp.tcd.ie peer together over local area net. It is normally sufficient just to pick one machine to peer with. - IT ntps.net4u.it (80.83.192.129)
Location: 4u Srl, Vercelli, Italy
Synchronization: NTP secondary (stratum 2), Linux 2 on Intel PIII 500MHz
Service area: Italy
Access policy: open access, please send a message to notify
Contact: timemaster@net4u.it - JP ntp.cyber-fleet.net
Location: Cyber Fleet, Inc., Tokyo, Japan
Geographic Coordinates: 35:43:59N, 139:40:50E
Synchronization: NTP V4 secondary (stratum 2), PC BSD/OS
Service Area: Japan/East Asia
Access policy: open access, please send a message to notify
Contact: pdp@cyber-fleet.net
Note: the IP address may change, please use DNS
Note: IPv4/IPv6 available. - KR ntp.ewha.net [211.39.143.103]
Location: KT-IDC, Bundang, Korea
Geographic Coordinates: 37:24:45.3N 127:07:28.5E (WGS 84)
Synchronization: NTP V3 (stratum 2), i586/Linux
Service area: Korea
Access policy: Open access within Korea, send email to notify. Please limit access to one or two hosts per site (large sites should set up their own ntp server)
Contact: ntp@ewha.net
Note: IP addresses are subject to change; please use DNS - MX ntp2a.audiotel.com.mx (200.34.146.67)
Location: Audiotel office, Mexico D.F., Mexico
Synchronization: NTP V3 secondary (stratum 2), NeXTstation/33
Service Area: Avantel, MCINet, Mexico
Access Policy: open access, but please send a message to notify.
Contact: Pedro Resendiz (resendiz@audiotel.com.mx) - MX ntp2b.audiotel.com.mx (200.34.146.68)
Location: Audiotel office, Mexico D.F., Mexico
Synchronization: NTP V3 secondary (stratum 2), NeXTstation/33
Service Area: Avantel, MCINet, Mexico
Access Policy: open access, but please send a message to notify.
Contact: Pedro Resendiz (resendiz@audiotel.com.mx) - MX ntp2c.audiotel.com.mx (200.34.146.69)
Location: Audiotel office, Mexico D.F., Mexico
Synchronization: NTP V3 secondary (stratum 2), NeXTstation/33
Service Area: Avantel, MCINet, Mexico
Access Policy: open access, but please send a message to notify.
Contact: Pedro Resendiz (resendiz@audiotel.com.mx) - MY ntp.doubleukay.com
Location: Cyberjaya, Malaysia
Synchronization: NTP V4 secondary (stratum 2), Intel/Linux
Service Area: Malaysia
Access Policy: open access
Contact: Woon Wai Keen (timekeeper@doubleukay.com) - NG ntp.supernet300.com (216.72.109.4)
Location: Supernet300, Lagos, Nigeria
Synchronization: NTP secondary (stratum 2), PC/Linux
Service Area: Western Africa, primarily Nigerian NITEL backbone
Access Policy: Open access, please send an email to notify before use.
Contact: timelords@supernet300.com
Note: Please use the DNS name-the IP address can (and likely will) change. - NL ntp1.theinternetone.net (62.4.94.221)
Location: The Internetone, Abovenet Amsterdam, The Netherlands
Synchronization: NTP V4 secondary (stratum 2), i686/Linux
Service Area: Netherlands/Europe, Abovenet
Access Policy: open access, please send a message to notify
Contact: Cees de Groot (cg@theinternetone.net)
Note: please choose one of ntp{1,2,3}.theinternetone.net. Use DNS, addresses subject to change - NL ntp2.theinternetone.net (62.4.94.8)
Location: The Internetone, Abovenet Amsterdam, The Netherlands
Synchronization: NTP V4 secondary (stratum 2), i686/Linux
Service Area: Netherlands/Europe, Abovenet
Access Policy: open access, please send a message to notify
Contact: Cees de Groot (cg@theinternetone.net)
Note: please choose one of ntp{1,2,3}.theinternetone.net. Use DNS, addresses subject to change - NL ntp3.theinternetone.net (62.4.94.210)
Location: The Internetone, Abovenet Amsterdam, The Netherlands
Synchronization: NTP V4 secondary (stratum 2), i686/Linux
Service Area: Netherlands/Europe, Abovenet
Access Policy: open access, please send a message to notify
Contact: Cees de Groot (cg@theinternetone.net)
Note: please choose one of ntp{1,2,3}.theinternetone.net. Use DNS, addresses subject to change - NO fartein.ifi.uio.no (129.240.64.3)
Location: University of Oslo, Norway
Geographic Coordinates: 59:56:32N, 10:43:22E
Synchronization: NTP secondary (stratum 2), DEC Alpha OSF/1 V4.0
Service Area: NORDUnet
Access Policy: open access
Contact: timekeeper@ifi.uio.no) - NO time.alcanet.no (use DNS)
Location: Alcanet International, Oslo, Norway
Synchronization: NTP V3 secondary (stratum 2), PC/Linux
Service Area: Europe=20
Access Policy: open access, notify message appreciated
Contact: timekeeper@alcanet.no - NZ ntp.iprolink.co.nz (use DNS)
Location: Iprolink, CBD, Auckland, New Zealand
Geographic coordinates: 36:50:59.6 S, 174:45:31.9 E, (GPS NZ Geodatum 1949)
Synchronisation: NTP V3 (stratum 2), Cisco Router
Service Area: New Zealand
Access Policy: Open access within New Zealand, send email to notify.
Contact: ntp@iprolink.co.nz
Note: IP addresses are subject to change; please use DNS - NZ ntp.massey.ac.nz (Use DNS)
Location: Massey University, Palmerston North, New Zealand
Synchronisation: NTP V4 (stratum 2), PC/Linux
Service Area: New Zealand
Access Policy: Open access within New Zealand
Contact: ntp@massey.ac.nz
Note: if multiple servers are required, use ntp1 and ntp2 - NZ ntp.public.otago.ac.nz (139.80.64.114)
Location: University of Otago, Dunedin, New Zealand
Synchronisation: NTP V3 (stratum 2), Linux on Intel
Service Area: New Zealand
Access Policy: Open access within New Zealand, send email to notify.
Contact: ntp@otago.ac.nz
Note: IP addresses are subject to change; please use DNS - NZ tk1.ihug.co.nz, tk2.ihug.co.nz, tk3.ihug.co.nz (use DNS)
Location: ihug, Central city, Auckland, New Zealand
Synchronisation: NTP V4 (stratum 2), PC/Linux
Service Area: New Zealand
Access Policy: Open access within New Zealand, send email to notify.
Contact: ntp@staff.ihug.co.nz
Note: IP addresses are subject to change; please use DNS - PL info.cyf-kr.edu.pl: 149.156.4.11
Location: Academic Computer Centre, CYFRONET, Krakow, Poland
Synchronization: NTP V3 secondary (stratum 2), HP/Unix
Service Area: Poland/Europe
Access policy: open access, please send a message to notify
Contact: Jerzy.Pawlus@cyf-kr.edu.pl - PT bug.fe.up.pt (193.136.54.1)
Location: Oporto University, Portugal
Synchronization: NTP secondary (stratum 2), i486/Linux
Service Area: Portugal/Europe
Access Policy: For use only by prior arrangement. Mail
timemaster@bug.fe.up.pt for more information. - RO ntp.ip.ro (212.93.129.107)
Location: IP Bucharest, Romania
Synchronization: NTP V3, Linux/i586
Service Area: Romania/Europe
Access Policy: open access, but please send a message to notify
Contact: ntp@ntp.ip.ro
Note: use DNS for IP address. - RU ntp.psn.ru (194.149.67.130)
Location: Pushchino, Moscow region, Russia
Geographic Coordinates: 54:50N, 37:37E
Synchronization: NTP secondary (stratum 2), Alpha/Linux
Service area: Russia
Access policy: open access, please send a message to notify
Contact: clockmaster@psn.ru - RU sign.chg.ru (193.233.46.10)
Location: Scientific Center in Chernogolovka, Moscow region, Russia
Synchronization: NTP V3 secondary (stratum 2), PC/FreeBSD 3.1
Service Area: Russia
Access Policy: open access, please send e-mail to notify.
Contact: Andrew Neporada (andrew@chg.ru) or time@sign.chg.ru - SE ntp.lth.se (130.235.20.3)
Location: Lund Institute of Technology, Lund, Sweden
Synchronization: NTP V3 secondary (stratum 2), Sun/Solaris
Service Area: Sweden, NORDUnet
Access Policy: open access, send email to notify. Please limit access to one or two hosts per site (large sites should set up their own ntp server)
Contact: timemaster@lth.se - SE time.flygplats.net
Location: flygplats.net, Sigtuna, Sweden
Synchronization: NTP V4 secondary, i386, FreeBSD
Service Area: Europe
Access Policy: Open access
Contact: timekeeper;@flygplats.net
Note: IP address subject to change; please use DNS. - SG ntp.shim.org
Location: Singapore
Synchronization: NTP secondary (stratum 2), Intel/Linux
Service Area: Singapore
Access Policy: open access
Contact: Dr Ivan Shim - SI biofiz.mf.uni-lj.si (193.2.69.10)
Location: Institute of Biophysics, University of Ljubljana, Slovenia
Geographic Coordinates: 46:03:09N, 14:30:40E
Synchronization: NTP V4 secondary (stratum 2), IBM/Linux
Service Area: Slovenia/Europe
Access Policy: open access, please send a message to notify
Contact: Primoz Peterlin (time@biofiz.mf.uni-lj.si) - SI ntp1.arnes.si (193.2.1.66)
Location: ARNES (Academic and Research Network of Slovenia), Ljubljana, Slovenia
Synchronization: NTP V4 secondary (stratum 2), Sun Sparc/Solaris
Service Area: Slovenia/Europe
Access Policy: open access with some restrictions (see http://www.arnes.si/english/ntp_access.html)
Contact: ntp-admin@arnes.si
Note: IP address subject to change; better useDNS - SI ntp2.arnes.si (193.2.1.92)
Location: ARNES (Academic and Research Network of Slovenia), Ljubljana, Slovenia
Synchronization: NTP V4 secondary (stratum 2), Sun Sparc/Solaris
Service Area: Slovenia/Europe
Access Policy: open access with some restrictions (see http://www.arnes.si/english/ntp_access.html)
Contact: ntp-admin@arnes.si
Note: IP address subject to change; better use DNS - SI time.ijs.si (193.2.4.6)
Location: J. Stefan Institute, Ljubljana, Slovenia
Geographic Coordinates: 46:02:35N, 14:29:17E (WGS84)
Synchronization: NTP V4 secondary (stratum 2), DEC Alpha / Digital Unix
Service Area: Slovenia/Europe
Access Policy: open access, glad to receive a note
Contact: Mark Martinec (timekeeper@ijs.si)
Note: IP address subject to change; better use DNS - SI time.ijs.si (193.2.4.6)
Location: J. Stefan Institute, Ljubljana, Slovenia
Geographic Coordinates: 46° 2.517'N, 14° 29.241'E (WGS84)
Synchronization: NTP V4 secondary (stratum 2), Compaq (DEC) Alpha / Tru64 Unix with MICRO_TIME kernel option
Service Area: Slovenia/Europe
Access Policy: open access, glad to receive a note
Contact: Mark Martinec (timekeeper@ijs.si); More info?
Note: IP address subject to change; better use DNS - SV clock.cimat.ues.edu.sv (168.243.7.66)
Location: Faculty of Natural Sciences and Mathematics, University of El Salvador, San Salvador, El Salvador
Synchronization: NTP V4 secondary (stratum 2), PC/Linux
Service Area: Central America
Access Policy: open access, please send a message to notify
Contact: (admin@cimat.ues.edu.sv)
Note: clock.cimat.ues.edu.sv is a CNAME - UK a.ntp.alphazed.net (212.42.1.207)
Location: Telehouse, London E14
Synchronization: NTP 4, FreeBSD
Service Area: all areas
Access Policy: open access
Contact: ntp@alphazed.com
Note: Please check http://www.alphazed.co.uk/support/ntp.php - TR time.deu.edu.tr (193.140.151.9)
Location: Dokuz Eylul University, Izmir, Turkey
Synchronization: NTP V4 Secondary (stratum 2), Sun SPARC10/Solaris,
Service Area: Turkey
Access Policy: Open access Please, send a mail to notify.
Contact: berent@deu.edu.tr
Note: IP address are subject to change; please use DNS - UK bear.zoo.bt.co.uk (132.146.236.132)
Location: BT Adastral Park, Ipswich, England
Synchronisation: NTP Secondary, PentiumIII/Linux 2.4
Service Area: UK
Access Policy: Open Access
Contact: John Sager, jcs@zoo.bt.co.uk
Note: WYSIWYG. No service guarantee, so don't use it as your sole sync source. - UK ntp.cis.strath.ac.uk
Location: Dept. Computer and Information Sciences, University of Strathclyde, Glasgow, Scotland.
Geographic Coordinates: 04:14W, 55:52N
Synchronization: NTP V4 secondary
Service Area: UK/Europe
Access Policy: open access
Contact: Ian Gordon (ntp@cis.strath.ac.uk)
Note: Do not use IP address because these can change - UK ntp.exnet.com (194.207.34.9)
Location: ExNet Ltd, London, UK
Synchronization: NTP secondary (stratum 2), Sun-4/Unix
Service area: UK/Europe/any
Access policy: semi-open access, please send message first for access
Contact: sysadmin@exnet.com or dhd@exnet.com
Note: Please see our Web page before using. Please use CNAME ntp.exnet.com since IP address may well change. - UK ntp2a.mcc.ac.uk (130.88.202.49)
Location: University of Manchester, Manchester, England
Synchronization: NTP secondary (S2), Sun/SunOS
Service Area: UK
Access Policy: Open Access
Contact(s): timelords@mcc.ac.uk
Note: Please use DNS for address, subject to change - UK ntp2b.mcc.ac.uk (130.88.200.98)
Location: University of Manchester, Manchester, England
Synchronization: NTP secondary (S2), PC/FreeBSD
Service Area: UK
Access Policy: Open Access
Contact(s): timelords@mcc.ac.uk
Note: Please use DNS for address, subject to change - UK ntp2c.mcc.ac.uk (130.88.200.4)
Location: University of Manchester, Manchester, England
Synchronization: NTP secondary (S2), PC/FreeBSD
Service Area: UK
Access Policy: Open Access
Contact(s): timelords@mcc.ac.uk
Note: Please use DNS for address, subject to change - UK ntp2d.mcc.ac.uk (130.88.203.12)
Location: University of Manchester, Manchester, England
Synchronization: NTP secondary (S2), SGI/Irix
Service Area: UK
Access Policy: Open Access
Contact(s): timelords@mcc.ac.uk
Note: Please use DNS for address, subject to change - UK ntp{0|1|2}.sandvika.net (194.164.127.{4|5|6})
Location: Telehouse Europe, London E14.
Geographic Coordinates: 51°30.71'N 0°00.08'W
Synchronisation: NTP V4 secondary Sun UltraSPARC Solaris 8
Service area: UK / Europe
Contact: time@sandvika.net
Note: www.sandvika.net/time (ntp2 new - due online mid-October 2002). - UK ntp0.uk.uu.net 158.43.128.33
Configuration: NTP V3 secondary (stratum 2), Sun sparc Ultra, Solaris 7, xntpd 3-5.93
Location: Cambridge, UK
Service Area: UUNET (formerly known in the UK as PIPEX); UK
Access Policy: Semi-open access. These are primarily for use by UUNET customers who may use them without asking, but others are welcome to peer if they give notice.
Contact: timelord@uk.uu.net
Note: This service is supported on a best-effort basis, but is not guaranteed. UUNET customers should peer with all three: ntp0.uk.uu.net, ntp1.uk.uu.net, and ntp2.uk.uunet. - UK ntp1.uk.uu.net 158.43.128.66
Configuration: NTP V3 secondary (stratum 2), Sun sparc Ultra, Solaris 7, xntpd 3-5.93
Location: Cambridge, UK
Service Area: UUNET (formerly known in the UK as PIPEX); UK
Access Policy: Semi-open access. These are primarily for use by UUNET customers who may use them without asking, but others are welcome to peer if they give notice.
Contact: timelord@uk.uu.net
Note: This service is supported on a best-effort basis, but is not guaranteed. UUNET customers should peer with all three: ntp0.uk.uu.net, ntp1.uk.uu.net, and ntp2.uk.uunet. - UK ntp2.uk.uu.net 158.43.192.66
Configuration: NTP V3 secondary (stratum 2), Sun sparc Ultra, Solaris 7, xntpd 3-5.93
Location: London, UK
Service Area: UUNET (formerly known in the UK as PIPEX); UK
Access Policy: Semi-open access. These are primarily for use by UUNET customers who may use them without asking, but others are welcome to peer if they give notice.
Contact: timelord@uk.uu.net
Note: This service is supported on a best-effort basis, but is not guaranteed. UUNET customers should peer with all three: ntp0.uk.uu.net, - UK tick.tanac.net (195.112.34.51)
Location: Wibble UK, Aylesbury, Buckinghamshire UK
Synchronization: NTP secondary (stratum 2), i686/Linux 2.2
Geographic Coordinates: 51 49 00 N 00 48 00 W
Service area: United Kingdom
Access policy: open access, please send a message to notify
Contact: ntp@tanac.net - UK; time-server.ndo.com (195.7.224.135)
Location: Telehouse Metro, London EC2A.
Geographic Coordinates: 51°31.21'N 0°05.01'W
Synchronisation: NTP secondary, PC/Debian Linux
Service area: UK / Europe
Access Policy: Open Access
Contact: support@ndo.com - US * time.cachenetworks.com (no address, please use dns)
Location: Multiple, United States
Synchronization: NTP V4 secondary (stratum 2)
Service area: US/any
Access policy: open access, please send a message to notify
Contact: Matt Levine (matt.levine@cachenetworks.com)
Note: service is (unicast) anycasted in multiple locations. - US AR sushi.compsci.lyon.edu (150.208.72.154)
Location: Lyon College Computer Science (Batesville, Arkansas USA)
Geographic Coordinates: 35.776N, 91.629W
Service Area: United States
Synchronization: NTP V4 secondary (stratum 2)
Access Policy: open access, please send a message to notify.
Contact: Matt Critcher (timekeeper@compsci.lyon.edu)
Note: IP's may change. Please use DNS. - US AZ decimal.lib.ci.phoenix.az.us (148.167.132.201)
Location: Phoenix, AZ
Synchronization: NTP V4 secondary (stratum 2) P-III/Linux 2.4
Service Area: North America
Access Policy: Open access. Please limit access to one or two hosts per site (large sites should set up their own ntp server)
Contact: timekeeper@phxlib.org - US AZ dewey.lib.ci.phoenix.az.us (148.167.132.200)
Location: Phoenix, AZ
Synchronization: NTP V4 secondary (stratum 2) P-III/Linux 2.4
Service Area: North America
Access Policy: Open access. Please limit access to one or two hosts per site (large sites should set up their own ntp server)
Contact: timekeeper@phxlib.org - US AZ ntp.drydog.com (207.211.160.111)
Location: Tempe, AZ
Synchronization: NTP V4 secondary (stratum 2) P-III/Linux 2.4
Service Area: Western United States and Northern Mexico
Access Policy: open access, please send a message to notify. Please limit access to one or two hosts per site (large sites should set up their own ntp server)
Contact: Dan Anderson ( timekeeper@drydog.com)
- US CA clock.fmt.he.net (216.218.192.202)
Location: Hurricane Electric, Fremont, California
Synchronization: NTP V4 primary (GPS), Symmetricom NTS-150
Service Area: all areas
Access Policy: open access
- US CA clock.sjc.he.net (216.218.254.202)
Location: Hurricane Electric, San Jose, California
Synchronization: NTP V4 primary (CDMA), Endrun Praecis CNTP
Service Area: all areas
Access Policy: open access
Contact: support@he.net - US CA ntp.ucsd.edu (132.239.254.49)
Location: UCSD Academic Computing Services/Network Operations, San Diego, CA
Synchronization: NTP secondary (stratum 2)
Service Area: CERFNET; NSFNET, SDSC region and nearby
Access Policy: open access, please send a message to notify.
Contact: timekeeper@ucsd.edu - US CA ntp1.mainecoon.com (63.192.96.2)
Location: Quincy, California
Geographic Coordinates: 39:56.863N, 120:54.657W
Synchronization: NTP V4 secondary (stratum 2) P-II/X86 Solaris 2.7
Service Area: North America
Access Policy: Open Access, please drop us a note so we can add you to our mailing list.
Contact:time@mainecoon.com or Chris Kennedy (chris@mainecoon.com)
Note: ntp1 is a CNAME for time service. Please use DNS; IP assignments subject to change. - US CA ntp2.mainecoon.com (63.192.96.3)
Location: Quincy, California
Geographic Coordinates: 39:56.863N, 120:54.657W
Synchronization: NTP V4 secondary (stratum 2) Sun 4/75 Solaris 2.7
Service Area: North America
Access Policy: Open Access, please drop us a note so we can add you to our mailing list.
Contact:time@mainecoon.com or Chris Kennedy (chris@mainecoon.com)
Note: ntp2 is a CNAME for time service. Please use DNS - US CA ntp1.sf-bay.org (207.126.97.57)
Location: San Jose, CA
Synchronization: NTP secondary (stratum 2), FreeBSD
Service Area: North America: Northern California and Pacific Northwest
Access Policy: open access, please send a message to notify
Contact: Scott Hazen Mueller (clockmaster@sf-bay.org) - US CA ntp2.sf-bay.org (204.74.68.55)
Location: Los Angeles, CA
Synchronization: NTP secondary (stratum 2), FreeBSD
Service Area: North America: Southern California
Access Policy: open access, please send a message to notify
Contact: Scott Hazen Mueller (clockmaster@sf-bay.org) - US CA ntp.ucsd.edu (132.239.254.49)
Location: UCSD Academic Computing Services/Network Operations, San Diego, CA
Synchronization: NTP secondary (stratum 2)
Service Area: CERFNET; NSFNET, SDSC region and nearby
Access Policy: open access, please send a message to notify.
Contact: timekeeper@ucsd.edu - US CA reloj.kjsl.com (204.87.183.6)
Location: Salinas, CA, USA
Synchronization: NTP V3 secondary (stratum 2), MultiNet on VMS
Service area: Western USA (Layer42 connectivity)
Access Policy: Open to stratum 2 servers, others upon request.
Contact: <timekeeper@kjsl.com>> - US CA time.berkeley.netdot.net (216.27.190.202)
Location: Berkeley, CA
Synchronization: NTP secondary (stratum 2), FreeBSD
Service Area: North America: Pacific Coast
Access Policy: open access, please send a message to notify
Contact: Caleb Haley (chaley@netdot.net)
Note: time.berkeley.netdot.net is a CNAME - US CA time.five-ten-sg.com (205.147.40.34)
Location: Lake Arrowhead, CA, USA
Synchronization: NTP V4 secondary (Stratum 2), Linux/intel
Service Area: within 100ms of Digilink.net
Access Policy: open access, email for firewall access first
Contact: carl@five-ten-sg.com - US CO ntp1.linuxmedialabs.com
Location: Linux Media Labs LLC, Colorado Springs, CO
Service Area: US
Synchronization: NTP Secondary (stratum 2), i686/Linux
Access Policy: open access
Contact: ntp@linuxmedialabs.com
Note: ntp1 is an alias and the IP address may change, please use DNS - US CO ntp1.tummy.com
Location: tummy.com, ltd., Fort Collins, CO
Service Area: US
Synchronization: NTP Secondary (stratum 2), i686/Linux
Access Policy: open access.
Contact: ntp@tummy.com
Note: ntp1 is an alias and the IP address may change, please use DNS. - US DE louie.udel.edu (128.4.40.12)
Location: University of Delaware, Newark, DE
Synchronization: NTP V3 secondary (stratum 2), Sun SPARC10/Solaris 2.6
Service Area: CAIRN, Abilene/vBNS
Access Policy: open access
Contact: Dave Mills <mills@udel.edu> - US GA ntp.shorty.com (208.21.108.186)
Location: CNSG, Atlanta, GA
Synchronization: NTP secondary (stratum 2), PC/Linux
Service Area: Southeast United States
Access Policy: Open access, please send an email to notify before use.
Contact: timelords@shorty.com
Note: Please use the CNAME ntp. IP addresses can (and likely will) change. - US GA rolex.usg.edu
Location: University System of Georgia NOC, Atlanta, GA
Synchronization: NTP secondary (stratum 2)
Service Area: PeachNet (Georgia)
Access Policy: open access, please send a message with the hostname and/or address of your NTP client to notify.
Contact: timekeeper@usg.edu - US GA timex.usg.edu
Location: University System of Georgia NOC, Atlanta, GA
Synchronization: NTP secondary (stratum 2)
Service Area: PeachNet (Georgia)
Access Policy: open access, please send a message with the hostname and/or address of your NTP client to notify.
Contact: timekeeper@usg.edu - US IL ntp-0.cso.uiuc.edu (130.126.24.53)
Location: University of Illinois, Urbana-Champaign, IL
Synchronization: NTP secondary (stratum 2), Cisco-ASM/4
Service Area: CICNET, Midwest, NCSA region
Access Policy: open access
Contact: Charley Kline (kline@uiuc.edu)
Note: select one of (ntp-0.cso.uiuc.edu, ntp-1.cso.uiuc.edu, ntp-2.cso.uiuc.edu) to equalize load. Use names rather than IP addresses if possible. The ntp-N aliases follow wherever the service is moved to. - US IL ntp-1.cso.uiuc.edu (130.126.24.24)
Location: University of Illinois, Urbana-Champaign, IL
Synchronization: NTP secondary (stratum 2), Cisco-ASM/4
Service Area: CICNET, Midwest, NCSA region
Access Policy: open access
Contact: Charley Kline (kline@uiuc.edu)
Note: select one of (ntp-0.cso.uiuc.edu, ntp-1.cso.uiuc.edu, ntp-2.cso.uiuc.edu) to equalize load. Use names rather than IP addresses if possible. The ntp-N aliases follow wherever the service is moved to. - US IL ntp-1.mcs.anl.gov (140.221.9.20)
Location: Argonne National Laboratory, near Chicago, IL
Synchronization: NTP V3 secondary (stratum 2), Sun Sparcstation
Service Area: NSF/ANSNet, CICNet, NetIllinois, ESNet, others welcome
Policy: open access, please send a message to notify
Contact: Systems Staff (ntp-contact@mcs.anl.gov)
Note: IP addresses are subject to change; please use DNS - US IL ntp-2.cso.uiuc.edu (130.126.24.44)
Location: University of Illinois, Urbana-Champaign, IL
Synchronization: NTP secondary (stratum 2), Cisco-ASM/4
Service Area: CICNET, Midwest, NCSA region
Access Policy: open access
Contact: Charley Kline (kline@uiuc.edu)
Note: select one of (ntp-0.cso.uiuc.edu, ntp-1.cso.uiuc.edu, ntp-2.cso.uiuc.edu) to equalize load. Use names rather than IP addresses if possible. The ntp-N aliases follow wherever the service is moved to. - US IL ntp-2.mcs.anl.gov (140.221.9.6)
Location: Argonne National Laboratory, near Chicago, IL
Synchronization: NTP secondary (stratum 2), Sun Sparcstation 2
Service Area: NSF/ANSNet, CICNet, NetIllinois, ESNet, others welcome
Access Policy: open access, please send a message to notify
Contact: Systems Staff (ntp-contact@mcs.anl.gov)
Note: IP addresses are subject to change; please use DNS - US IN gilbreth.ecn.purdue.edu (128.46.129.93, 128.46.141.93, 128.46.147.93, 128.46.148.93, 128.46.171.93)
Location: Purdue University Engineering Computer Network, West Lafayette, IN
Synchronization: NTP V3 secondary (stratum 2), Sun SPARCserver 1000/Solaris 2.3
Service area: NSFNET, CICNET area
Access policy: open access
Contact: Mike Moya (moyman@ecn.purdue.edu) - US IN harbor.ecn.purdue.edu (128.46.128.76, 128.46.129.76, 128.46.154.76)
Location: Purdue University Engineering Computer Network, West Lafayette, IN
Synchronization: NTP V3 secondary (stratum 2), Sun-4/75+/Solaris 2.3
Service area: NSFNET, CICNET area
Access policy: open access
Contact: Mike Moya (moyman@ecn.purdue.edu) - US IN horologe.cerias.purdue.edu(128.10.252.1)
Location: CERIAS, Purdue University, West Lafayette, IN
Synchronization: NTP V3/V4 stratum 2 server, Cisco router
Geographic Coordinates: 40:25:33.2N, 86:54:54.7W (GPS)
Service Area: Purdue University hosts only
Access Policy: open access to Purdue University addresses. Please see our ntp WWW page.
Contact: Gene Spafford ( ntp-request@cerias.purdue.edu)
Note: This host does not support "daytime" -- only UDP-based NTP. - US IN molecule.ecn.purdue.edu (128.46.129.95, 128.46.132.95, 128.46.136.95, 128.46.145.95, 128.46.167.95, 128.46.169.95, 128.46.181.95)
Location: Purdue University Engineering Computer Network, West Lafayette, IN
Synchronization: NTP V3 secondary (stratum 2), Sun SPARCserver 1000/Solaris 2.3
Service area: NSFNET, CICNET area
Access policy: open access
Contact: Mike Moya (moyman@ecn.purdue.edu) - US IN tick.cerias.purdue.edu(128.10.252.9), tock.cerias.purdue.edu(128.10.252.10)
Location: CERIAS, Purdue University, West Lafayette, IN
Synchronization: NTP V3/V4 stratum 2 servers
Geographic Coordinates: 40:25:33.2N, 86:54:54.7W (GPS)
Service Area: Internet2, CIC and midwest US
Access Policy: Open access but please see our ntp WWW page.
Contact: Gene Spafford ( ntp-request@cerias.purdue.edu)
Note: This host does not support "daytime" -- only UDP-based NTP. - US KS ntp1.kansas.net (199.240.130.1)
Location: KansasNet OnLine Services, Manhattan, KS
Synchronization: NTP V3 secondary (stratum 2), Linux on Intel
Service area: Central USA / Great Plains
Access policy: open access to ntp1.kansas.net *or* ntp2.kansas.net; customers may use both servers.
Contact: support@kansas.net - US KS ntp2.kansas.net (199.240.130.12)
Location: KansasNet OnLine Services, Manhattan, KS
Synchronization: NTP V3 secondary (stratum 2), Linux on Intel
Service area: Central USA / Great Plains
Access policy: open access to ntp1.kansas.net *or* ntp2.kansas.net; customers may use both servers.
Contact: support@kansas.net - US MA ntp.ourconcord.net (216.204.156.2)
Location: Concord, MA
Synchronization: NTP v4 stratum 2, Linux
Service Area: Eastern time zone
Access Policy: open access
Contact: Bruce Walker (timekeeper@quidnet.com) - US MN ns.nts.umn.edu (128.101.101.101)
Location: Minneapolis, MN
Synchronization: NTP secondary (stratum 2), Sun/SunOS 4.1.3
Service Area: CICNET region
Access Policy: open access, please send a message to notify.
Networking & Telecommunications Services (nts@nts.umn.edu)
Note: select one of ns.nts.umn.edu or nss.nts.umn.edu to equalize load - US MN nss.nts.umn.edu (134.84.84.84)
Location: St Paul, MN
Synchronization: NTP secondary (stratum 2), Sun/SunOS 4.1.3
Service Area: CICNET region
Access Policy: open access, please send a message to notify.
Networking & Telecommunications Services (nts@nts.umn.edu)
Note: select one of ns.nts.umn.edu or nss.nts.umn.edu to equalize load - US MO time-ext.missouri.edu (NO IP LISTED)
Location: University of Missouri-Columbia, Columbia, MO, USA
Synchronization: NTP secondary (stratum 2), Linux/Intel
Service Area: MOREnet
Access Policy: open access, please send a message to notify
Contact: time@missouri.edu - US MT chronos1.umt.edu (192.73.48.1)
Location: University of Montana, Missoula, Montana
Synchronization: NTP secondary (stratum 2), Cisco 7507
Service Area: Northwest USA, Internet 2
Access Policy: open access, please send message to notify
Contact: Michael Bloom (michaelb@selway.umt.edu)
Note: IP addresses are subject to change; please use DNS if possible - US MT chronos2.umt.edu (192.73.48.2)
Location: University of Montana, Missoula, Montana
Synchronization: NTP secondary (stratum 2), Cisco 7507
Service Area: Northwest USA, Internet 2
Access Policy: open access, please send message to notify
Contact: Michael Bloom (michaelb@selway.umt.edu)
Note: IP addresses are subject to change; please use DNS if possible - US MT chronos3.umt.edu (192.73.48.6)
Location: University of Montana, Missoula, Montana
Synchronization: NTP secondary (stratum 2), Cisco 7507
Service Area: Northwest USA, Internet 2
Access Policy: open access, please send message to notify
Contact: Michael Bloom (michaelb@selway.umt.edu)
Note: IP addresses are subject to change; please use DNS if possible - US NC clock1.unc.edu (152.2.21.1)
Location: University of North Carolina-Chapel Hill, Chapel Hill, NC
Geographic Coordinates: 35:54N, 79:03W
Synchronization: NTP secondary (stratum 2), Sun4/SunOS/xntpd (V3)
Service Area: CONCERT region
Access Policy: CONCERT region, others by prior arrangement
Contact: Timekeeper (timekeeper@clock1.unc.edu) NOTE: The default restriction on this host is "noserve". Hosts outside the service area must make prior arrangements to receive time service. - US NJ tick.jrc.us (65.211.109.1)
Location: Jensen Research Corporation, Oakland NJ
Geographic Coordinates: 41 00.975 N, 74 15.262 W
Synchronization: NTP V3 secondary (stratum 2), Cisco 3620 IOS 12.2
Service Area: Eastern US
Access Policy: Open access; please send a message to notify.
Contact: JRC Network Ops (noc@jensenresearch.com) 201 337-4000
Note: IP addresses are subject to change; please use DNS. - US NJ tock.jrc.us (65.211.109.11)
Location: Jensen Research Corporation, Oakland NJ
Geographic Coordinates: 41 00.975 N, 74 15.262 W
Synchronization: NTP V4 secondary (stratum 2), Intel PIII/866 Win2K
Service Area: Eastern US
Access Policy: Open access; please send a message to notify.
Contact: JRC Network Ops (noc@jensenresearch.com) 201 337-4000
Note: IP addresses are subject to change; please use DNS. - US NV cuckoo.nevada.edu (131.216.1.101)
Location: University of Nevada System Computing Services, Las Vegas,NV
Synchronization: NTP V3 secondary (stratum 2), DEC Alpha/Unix
Service Area: NevadaNet, NSFNET, SDSC region
Access Policy: open access, please send message to notify
Contact: Systems Group (software@nevada.edu)
Note: cuckoo.nevada.edu is a CNAME for alphabits.nevada.edu - US NV tick.cs.unlv.edu (131.216.22.15)
Location: UNLV College of Engineering, Las Vegas, NV
Synchronization: NTP V4 secondary (stratum 2), Solaris
Service Area: Sprintnet
Access Policy: open access, an email note is appreciated
Contact: <staff@egr.unlv.edu>
Note: select one of tick.cs.unlv.edu or tock.cs.unlv.edu at random to equalize load - US NV tock.cs.unlv.edu (131.216.22.17)
Location: UNLV College of Engineering, Las Vegas, NV
Synchronization: NTP V4 secondary (stratum 2), Solaris
Service Area: Sprintnet
Access Policy: open access, an email note is appreciated
Contact: <staff@egr.unlv.edu>
Note: select one of tick.cs.unlv.edu or tock.cs.unlv.edu at random to equalize load - US NY clock.nyc.he.net (209.51.161.238)
Location: Hurricane Electric, New York City, New York
Synchronization: NTP V4 primary (CMDA), Endrun Praecis CNTP
Service Area: all areas
Access Policy: open access
Contact: support@he.net - US NY ntp0.cornell.edu
Location: Cornell University, Ithaca, NY
Synchronization: NTP secondary (stratum 2), Sun/Unix
Service Area: NYSERNet, NYSERNet 2000, Internet2/Abilene, vBNS
Access Policy: open access
Contact: Dan Eckstrom (de10@cornell.edu)
Note: IP addresses are subject to change; please use DNS.
Note: Open access for clients, though an email is appreciated (especially if peering). - US NY reva.sixgirls.org (66.250.131.180)
Location: The NYITC Building, 55 Broad Street, New York City, NY
Geographic Coordinates: 40:42:20N, 74:0:40W
Synchronization: NTP V4 secondary (stratum 2), m68k/NetBSD
Service Area: New York, New Jersey, Connecticut, Long Island areas
Access Policy: open access
Contact: John Klos (john@sixgirls.org) - US NY sundial.columbia.edu (128.59.59.177)
Location: Morningside Campus, Columbia University, New York, NY
Synchronization: NTP V3 secondary (stratum 2), Sun Sparc10 model 40
Service Area: NYSERnet
Access Policy: open access; please use name rather than address.
Contact: timekeeper@columbia.edu - US NY timex.cs.columbia.edu (128.59.16.20)
Location: Columbia University Computer Science Department, New York City, NY
Synchronization: NTP secondary (stratum 2), Sun/Unix
Service Area: PSINET; NSFNET, NYSER region
Access Policy: open access, authenticated NTP (DES/MD5) available
Contact: James Tanis (timekeeper@cs.columbia.edu)
Note: IP addresses are subject to change; please use DNS - US PA clock-1.cs.cmu.edu (128.2.250.95)
Location: Carnegie Mellon University Computer Science, Pittsburgh, PA
Synchronization: NTP V3 secondary (stratum 2), Sun Sparc/Solaris 2.5.1
Service Area: PSC region
Access Policy: semi-open access; for use only by prior arrangement
Contact: Help@cs.cmu.edu
Note: The host name is an alias used only for time service. - US PA clock-2.cs.cmu.edu (128.2.222.8)
Location: Carnegie Mellon University Computer Science, Pittsburgh, PA
Synchronization: NTP V3 secondary (stratum 2), Sun Sparc/SunOS 4.1.4
Service Area: PSC region
Access Policy: semi-open access; for use only by prior arrangement
Contact: Help@cs.cmu.edu
Note: The host name is an alias used only for time service. - US PA clock.psu.edu (128.118.25.3)
Location: Penn State University, University Park, PA
Geographic Coordinates: 40:47:58.1N, 77:51:44.8W (USGS 40077-G7-TF-024)
Synchronization: NTP V3 secondary (stratum 2), Sun/Unix
Service Area: Internet2, vBNS, CERFnet(AT & T IP Services), PSC/NCNE, CASC.
Access Policy: open access
Contact: John Balogh <JDB@psu.edu>
Note: clock.psu.edu is a CNAME for otc2.psu.edu - US PA fuzz.psc.edu (128.182.58.100)
Location: Pittsburgh Supercomputing Center, Pittsburgh, PA
Synchronization: NTP V3 secondary (stratum 2), DEC5000/200
Service area: NSFNET, PSC region
Access policy: open access, but please send a message to notify.
Contact: noc@psc.edu - US PA ntp-1.cede.psu.edu (146.186.218.60)
Location: Penn State University, University Park, PA
Synchronization: NTP V4 secondary (stratum 2), IBM RS/6000-B50, Debian GNU Linux
Service Area: Internet2, vBNS, CERFnet, PSC/NCNE
Access Policy: open access, please send a message to notify
Contact: timekeeper@cede.psu.edu
Note: IP addresses are subject to change; please use DNS - US PA ntp-2.cede.psu.edu (146.186.218.253)
Location: Penn State University, University Park, PA
Synchronization: NTP V4 secondary (stratum 2), i686, Debian GNU Linux
Service Area: Internet2, vBNS, CERFnet, PSC/NCNE
Access Policy: open access, please send a message to notify
Contact: timekeeper@cede.psu.edu
Note: IP addresses are subject to change; please use DNS - US PA ntp-1.ece.cmu.edu (no address, please use DNS)
Location: Carnegie Mellon Electrical and Computer Engineering, Pittsburgh, PA
Geographic Coordinates: 40:26N, 79:57W
Synchronization: NTP V3 secondary (stratum 2), Solaris 9
Service Area: PREPNET, PSC region
Access Policy: open access
Contact: ECE Facilities (gripe@ece.cmu.edu)
Note: Name is an alias for use by NTP. - US PA ntp-2.ece.cmu.edu (no address, please use DNS)
Location: Carnegie Mellon Electrical and Computer Engineering, Pittsburgh, PA
Geographic Coordinates: 40:26N, 79:57W
Synchronization: NTP V3 secondary (stratum 2), Solaris 9
Service Area: PREPNET, PSC region
Access Policy: open access
Contact: ECE Facilities (gripe@ece.cmu.edu)
Note: Name is an alias for use by NTP. - US TX ntp.cox.smu.edu (129.119.80.126)
Location: Cox School of Business, Southern Methodist University, Dallas, TX
Synchronization: NTP V3 secondary (stratum 2), DEC 3000/300LX AXP DEC OSF/1 AXP
Service Area: NSFNET, SESQUI region
Access Policy: open access
Contact: Allen Gwinn (allen@mail.cox.smu.edu)
Note: Please send e-mail letting us know you will be using ntp.cox.smu.edu. ntp.cox.smu.edu is a CNAME for nyse.cox.smu.edu. - US TX ntp.fnbhs.com (209.144.20.76)
Location: First National Bank of Hughes Springs, TX
Synchronization: NTP secondary (stratum 2), Debian Linux 2.1
Service area: Northeast Texas
Access policy: open access, please send a message to notify
Contact: walterp@fnbhs.com - US TX ntp.tmc.edu (128.249.1.10)
Location: US TX ntp.tmc.edu (128.249.1.10)
Location: Baylor College of Medicine, Houston, TX
Synchronization: NTP secondary (stratum 2), Sun/Solaris
Service Area: NSFNET, SESQUI region
Access Policy: open access to other stratum 2 servers and upstream for statum 3 servers;not to be used for individual servers;please notify before use
Contact: Postmaster (postmaster@tmc.edu) - US TX ntppub.tamu.edu (no address available)
Location: Texas A&M University, College Station, TX
Synchronization: NTP secondary (stratum 2, ver. 3), SPARCstation 10/Solaris 1.x
Service area: NSFNET, SESQUI region, THEnet, TAMUSDSN
Access policy: open access
Contact: NTP Administrator (ntp@tamu.edu) - US TX tick.greyware.com (207.55.146.19)
Location: Greyware Automation Products, Plano, TX
Synchronization: NTP secondary (stratum 2), Windows NT
Service Area: South-Central US, others by arrangement
Access Policy: open access for any server with 50+ clients
Contact: techsupport@greyware.com
Note: IP may change, please use DNS name. Other protocols offered include TIME-UDP, TIME-TCP, and Domain Time II - US TX tock.greyware.com (207.55.146.54)
Location: Greyware Automation Products, Plano, TX
Synchronization: NTP secondary (stratum 2), Windows NT
Service Area: South-Central US, others by arrangement
Access Policy: open access for any server with 50+ clients
Contact: techsupport@greyware.com
Note: IP may change, please use DNS name. Other protocols offered include TIME-UDP, TIME-TCP, and Domain Time II - US VA ntp-1.vt.edu (198.82.1.201)
Location: Virginia Tech, Blacksburg, Virginia, USA
Synchronization: V3 Stratum 2 synced to local GPS primary servers
Service Area: US southeastern region, Abilene
Access Policy: open access
Info: Communications Network Services
Contact: ntp@cns.vt.edu - US VA ntp-2.vt.edu (198.82.1.202)
Location: Virginia Tech, Blacksburg, Virginia, USA
Synchronization: V3 Stratum 2 synced to local GPS primary servers
Service Area: US southeastern region, Abilene
Access Policy: open access
Info: Communications Network Services
Contact: ntp@cns.vt.edu - US VA ntp-3.vt.edu (198.82.1.203)
Location: Virginia Tech, Blacksburg, Virginia, USA
Synchronization: V3 Stratum 2 synced to local GPS primary servers
Service Area: US southeastern region, Abilene
Access Policy: open access
Info: Communications Network Services
Contact: ntp@cns.vt.edu - US VA ntp-4.vt.edu (198.82.1.204)
Location: Virginia Tech, Blacksburg, Virginia, USA
Synchronization: V3 Stratum 2 synced to local GPS primary servers
Service Area: US southeastern region, Abilene
Access Policy: open access
Info: Communications Network Services
Contact: ntp@cns.vt.edu - US VT ntp0.state.vt.us (159.105.23.194)
Location: Vermont Agency of Administration, Montpelier
Synchronization: NTP V3 secondary (stratum 2), IBM RS/6000 AIX 4.3.3
Service Area: Vermont
Access Policy: semi-open access; for use by any Govnet/K12net/VALS clients (159.105/16 & 170.222/16 prefixes)
Contact: <info@govnet.state.vt.us>
Note: The host name is an alias used only for time service. - US VT ntp1.state.vt.us (159.105.23.130)
Location: Vermont Agency of Administration, Montpelier
Synchronization: NTP V3 secondary (stratum 2), IBM RS/6000 AIX 4.3.3
Service Area: Vermont
Access Policy: semi-open access; for use by any Govnet/K12net/VALS clients (159.105/16 & 170.222/16 prefixes)
Contact: <info@govnet.state.vt.us>
Note: The host name is an alias used only for time service. - US VT ntp2.state.vt.us (170.222.64.130)
Location: Vermont Agency of Administration, Montpelier
Synchronization: NTP V3 secondary (stratum 2), IBM RS/6000 AIX 4.3.3
Service Area: Vermont
Access Policy: semi-open access; for use by any Govnet/K12net/VALS clients (159.105/16 & 170.222/16 prefixes)
Contact: <info@govnet.state.vt.us>
Note: The host name is an alias used only for time service. - US WA [UltiMeth Systems]
Location: Mill Creek (30km N of Seattle), Washington, USA
Geographic Coordinates: 47:51:40.7N 122:11:23.5W
Synchronization: NTP v4 stratum-2
Service Area: Northwestern USA.
Access Policy: Prior permission is now required, due to bozos.
Contact: See our time server usage notes. - US WI ntp1.cs.wisc.edu (128.105.39.11)
Location: Computer Science Department, University of Wisconsin-Madison
Geographic Coordinates: 89:24:30W, 43:08:00N
Synchronization: NTP V4 secondary Solaris 2.7
Service Area: US/any
Access Policy: open access
Contact: David Thompson ( ntp-admin@cs.wisc.edu)
Note: IP addresses are subject to change; please use DNS - US WI ntp3.cs.wisc.edu (128.105.37.11)
Location: Computer Science Department, University of Wisconsin-Madison
Geographic Coordinates: 89:24:30W, 43:08:00N
Synchronization: NTP V4 secondary Solaris 2.7
Service Area: US/any
Access Policy: open access
Contact: David Thompson ( ntp-admin@cs.wisc.edu)
Note: IP addresses are subject to change; please use DNS - US WI ntp3.sf-bay.org (207.126.97.57)
Location: Milwaukee, WI
Synchronization: NTP secondary (stratum 2), FreeBSD
Service Area: North America: Central Time Zone
Access Policy: open access, please send a message to notify
Contact: Scott Hazen Mueller (clockmaster@sf-bay.org) - VE ntp.linux.org.ve (150.188.8.196)
Localizaci: VELUG, Grupo de Usuarios Linux de Venezuela
Sincronizaci: NTP secundario (stratum 2), Pentium/Linux
Area de Servicio: Arica
Potica de Acceso: Abierta, por favor enviar e-mail para notificar
Contacto: time@linux.org.ve - ZA ntp.cs.unp.ac.za (143.128.82.200)
Location: Natal University, Pietermaritzburg, South Africa
Synchronization: NTP V3 secondary (stratum 2), SGI Indy/Irix6.2
Service area: South Africa
Access policy: open access, please send a message to notify
Contact: sysadmin@cs.unp.ac.za - ZA tock.nml.csir.co.za (146.64.241.229)
Location: Pretoria, South Africa
Geographic Coordinates: 25,7461 S 28,2770 E (WGS-84)
Service Area: Southern Africa
Synchronization: NTP secondary (stratum 2), i386/FreeBSD
Access Policy: open access
Contact: elmarais@csir.co.za
Discontinued Service
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