The List of Public Primary (stratum 2) Time Servers

Argentina

Location: Sinectis S.A., Buenos Aires (Argentina)
Geographic Coordinates: 3432'S, 5820'W
Synchronization: NTP V3 secondary (stratum 2), i686/Linux
Service Area: Argentina
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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Belgium

Location: Brussels, Belgium
Synchronization: xntpd (stratum 2), linux/unix
Service Area: European Union
Access Policy: open access
Contact: Belbone NOC (timemaster@belbone.be)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Location: Brussels, Belgium
Synchronization: xntpd (stratum 2), linux/unix
Service Area: European Union
Access Policy: open access
Contact: Belbone NOC (timemaster@belbone.be)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Brazil

Location: Brazilian Research Network/Rede Nacional de Pesquisa (RNP)
Synchronization: NTP V4 Secondary (stratum 2), Sun SPARC10/Solaris,
Service Area: Brazil
Access Policy: Open access to stratum 2 and stratum 3 NTP servers. Please, send a mail to notify.
Contact: ntp-admin@cais.rnp.br

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Location: Telemacro Sistemas e Servi?os
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

Supports following time protocols:
- Time Protocol (TCP/IP)

Location: PoP-PR/Brazilian Research Network (RNP)
Synchronization: NTP V4 Secondary (stratum 2), IBM RS6000 - 43P-240 /Debian GNU Linux
Service Area: Brazil
Access Policy: Open access to stratum 2 server. Please, send a mail to notify.
Contact: ntp-admin@pop-pr.rnp.br

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Canada

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=-6:00

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Croatia

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Location: CARNet (Croatian Academic and Research Network), Osijek, 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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=+2:00

Czech Republic

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Germany

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

El Salvador

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=-5:00

France

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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: see ntp{1,2}.tuxfamily.net entries for more information

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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: If you use this service reguraly, you should subscribe to ntp@tuxfamily.org

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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: If you use this service reguraly, you should subscribe to ntp@tuxfamily.org

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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: 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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Greece

Location: Athens, GR
Synchronization: NTP V3 secondary (stratum 2), i686/FreeBSD
Service Area: Greece
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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Hong Kong

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Hungary

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)

Ireland

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=+2:00

Italy

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Korea

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Malaysia

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Netherlands

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

New Zealand

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Norway

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=+3:00

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Russia

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=+4:00

Slovenia

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=+3:00

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Spain

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Sweden

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Turkey

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

United Kingdom

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=+2:00

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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).

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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).

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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).

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

USA

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Arizona

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

California

Location: Hurricane Electric, Fremont, California
Synchronization: NTP V4 primary (GPS), Symmetricom NTS-150
Service Area: all areas
Access Policy: open access
Contact: support@he.net

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x,_%M_%d,_%Y,_%h:^n:%m-%z

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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 DNSUS

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Location: Salinas, CA, USA
Synchronization: NTP V3 secondary (stratum 2), MultiNet on VMS
Service Area: Western USA (Layer42 connectivity)
Access Policy: open access, please drop me a note if you use the server so I can keep you on the notify list.
Contact: <timekeeper@kjsl.com>

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Colorado

Location: tummy.com, ltd., Fort Collins, CO
Synchronization: NTP Secondary (stratum 2), i686/Linux
Service Area: US
Access Policy: open access.
Contact: ntp@tummy.com
Note: ntp1 is an alias and the IP address may change, please use DNS.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Delaware

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>

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Georgia

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=-4:00

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=-4:00

Illinois

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Location: Argonne National Laboratory, near Chicago, IL
Synchronization: NTP V3 secondary (stratum 2), Sun Sparcstation
Service Area: NSF/ANSNet, CICNet, NetIllinois, ESNet, others welcome

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Indiana

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Kansas

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Massachusetts

Location: Concord, MA
Synchronization: NTP v4 stratum 2, Linux
Service Area: Eastern time zone
Access Policy: open access
Contact: Bruce Walker (timekeeper@quidnet.com)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Massachusetts

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Missouri

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)

Minnesota

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (UDP/IP)

North Carolina

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

New Jersey

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Nevada

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)

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: <grayaw@egr.unlv.edu>
Note: select one of tick.cs.unlv.edu or tock.cs.unlv.edu at random to equalize load

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Location: UNLV College of Engineering, Las Vegas, NV
Synchronization: NTP V4 secondary (stratum 2), Mips/Unix
Service Area: Sprintnet
Access Policy: open access, an email note is appreciated
Contact: <grayaw@egr.unlv.edu>
Note: select one of tick.cs.unlv.edu or tock.cs.unlv.edu at random to equalize load

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

New York

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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: Open access for clients, though an email is appreciated (especially if peering).

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=-4:00

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=-4:00

Pennsylvania

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=-4:00

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=-4:00

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)

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.

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)

Texas

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)

Virginia

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 <http://rdweb.cns.vt.edu/>
Contact: ntp@cns.vt.edu

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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 <http://rdweb.cns.vt.edu/>
Contact: ntp@cns.vt.edu

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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 <http://rdweb.cns.vt.edu/>
Contact: ntp@cns.vt.edu

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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 <http://rdweb.cns.vt.edu/>
Contact: ntp@cns.vt.edu

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Wisconsin

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

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)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Venezuela

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

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

South Africa

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

Supports following time protocols:
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=+2:00

Location: Pretoria, South Africa
Geographic Coordinates: 25,7461 S 28,2770 E (WGS-84)
Synchronization: NTP secondary (stratum 2), i386/FreeBSD
Service Area: Southern Africa
Access Policy: open access
Contact: elmarais@csir.co.za

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=+3:00

Other

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Supports following time protocols:
- Time Protocol (UDP/IP)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)
- Time Protocol (TCP/IP)
- Time Protocol (UDP/IP)
- Daytime Protocol (UDP/IP)

DAYTIME timestamp format:
%x_%M_%d_%h:%n:%s_%Y_%z=+2:00

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)

Supports following time protocols:
- Simple Network Time Protocol (UDP/IP)