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The following was captured Jan of 2002 from "http://www.eecis.udel.edu/~mills/ntp/clock1.htm" in case that server is no longer online, please try that link to be sure you get the latest information.

Public NTP Primary (stratum 1) Time Servers

Important: See Public NTP Time Servers for the rules of engagement and general conditions of use. The servers in this list are sorted first by country code, then state code (US only), then host name. Last update: 11 anuary 2002 UTC


Active Servers

    AU ntp.ise.canberra.edu.au (137.92.140.80)
    Location: The University of Canberra, Canberra Australia.
    Geographic Coordinates: 35:14.2819S 149:05.1620E (WGS-84)
    Synchronization: NTP V4 primary (GPS clock), i386/NetBSD 1.5.2
    Service area: Australia, New Zealand
    Access policy: open access, please limit to two peer hosts per site
    Contact: Ross Johnson (ntp@ise.canberra.edu.au)

    AU ntp.cs.mu.OZ.AU (128.250.36.2)
    Location: The University of Melbourne, Melbourne Australia.
    Geographic Coordinates: 37:48:06S 144:57:44E
    Synchronization: NTP V3 primary (GPS clock), Sun Sparc2/SunOS 4.1.4
    Service area: Australia, New Zealand, PACCOM (by prior arrangement)
    Access policy: open access, please limit to two peer hosts per site
    Contact: David Hornsby (ntp@cs.mu.OZ.AU)

    AU ntp.mel.nml.CSIRO.AU (138.194.21.154)
    Location: CSIRO Division of Materials Science and Technology, Melbourne, Australia.
    Geographic Coordinates: 37:54:25S 145:08:05E
    Synchronization: NTP V4, primary clock is a HP 5071A Caesium Beam Frequency Standard (synchronized to UTC Australia via a common view GPS link) via a custom interface, backup is a Truetime GPS receiver, Linux
    Service Area: AARNet
    Access Policy: open access
    Contact: time@tip.csiro.au
    Note: This NTP server is operated by the CSIRO National Measurement Laboratory, Sydney, Australia.

    AU ntp.nml.csiro.au (130.155.98.1)
    Location: CSIRO National Measurement Laboratory, Sydney, Australia.
    Geographic Coordinates: 33:46:58S 151:09:06E
    Synchronization: NTP V4, primary clock is a HP 5071A Caesium Beam Frequency Standard (designated as UTC Australia) via a custom interface and a Leitch CSD-5300 Master Clock System Driver, backup clocks are a Truetime GPS receiver and a Hewlett Packard GPS receiver, Linux
    Service Area: AARNet
    Access Policy: open access
    Contact: time@tip.csiro.au

    AU ntp.per.nml.csiro.au (130.95.156.206)
    Location: Physics Department,University of WA, Perth, Australia.
    Geographic Coordinates: 31:58:43S 115:49:00E
    Synchronization: NTP V4, primary clock is a rubidium oscillator (synchronized to UTC Australia via a common view GPS link) via a custom interface, backup is a Motorola UT Oncore GPS receiver, Linux
    Service Area: AARNet
    Access Policy: open access
    Contact: time@tip.csiro.au
    Note: This NTP server is operated by the CSIRO National Measurement Laboratory, Sydney, Australia.

    BR ntp1.rnp.br (200.19.119.69)
    Location: Brazilian Research Network/Rede Nacional de Pesquisa (RNP)
    Geographic Coordinates: 15=B0 48.275963' S, 47=B0 52.904663' N, 1101.146m (WGS-84)
    Synchronization: NTP V4 Primary (Trimble Palisade GPS), FreeBSD/Unix
    Service Area: Brazil
    Access Policy: Open access to stratum 1, stratum 2 within Brazilian Research Network (RNP). Others by prior arrangement only.
    Contact: ntp-admin@rnp.br

    CA clock.cmc.ec.gc.ca
    Location: Canadian Meteorological Centre, Dorval, Québec, Canada
    Synchronization: NTP V3 primary (GOES OM/DC-468 clock), HP-UX/Unix
    Service Area: Econet (Environment Canada national network)
    Access Policy: open within Econet. Outside by prior arrangement only.
    Contact: ( ntp-admin@cmc.ec.gc.ca)

    CA clock.uregina.ca (142.3.100.2)
    Location: University of Regina, Regina, Saskatchewan, Canada
    Geographic Coordinates: 50:25N , 104:35W
    Synchronization: NTP V4 Primary (GPS clock), PC/FreeBSD
    Service Area: SASK#net, CA*net, Canada
    Access Policy: open to stratum2 time servers, others by arrangement.
    Contact: Mark Haidl (timekeeper@uregina.ca)
    Note: for reliable access please notify with IP of your server

    CA tick.usask.ca (128.233.3.100)
    Location: University oc Saskatchewan, Saskatoon, Saskatchewan, SK, Canada
    Geographic Coordinates: 52:08:01N,106:38:11W
    Synchronization: NTP V3 Primary (GOES clock), DEC Mips/Unix
    Service Area: SASK#net, CA*net, Canada
    Access Policy: open access, prior arrangment required
    Contact: Alfred Hovdestad (alfred.hovdestad@usask.ca)
    Note: priority given to local regional sites
    Note: tick.usask.ca and tock.usask.ca share a single GOES receiver

    CA tock.usask.ca (128.233.3.101)
    Location: University oc Saskatchewan, Saskatoon, Saskatchewan, SK, Canada
    Geographic Coordinates: 52:08:01N,106:38:11W
    Synchronization: NTP V3 Primary (GOES clock), DEC Mips/Unix
    Service Area: SASK#net, CA*net, Canada
    Access Policy: open access, prior arrangment required
    Contact: Alfred Hovdestad (alfred.hovdestad@usask.ca)
    Note: priority given to local regional sites
    Note: tick.usask.ca and tock.usask.ca share a single GOES receiver

    CH swisstime.ethz.ch (129.132.2.21)
    Location: Integrated Systems Laboratory, Swiss Fed. Inst. of Technology, CH 8092 Zurich, Switzerland
    Geographic Coordinates: 47:23N, 8:32E
    Synchronization: NTP primary (DCF77 clock), Sun-4/SunOS 4.1.4
    Service Area: Switzerland/Europe
    Access Policy: open access
    Contact: Christoph Wicki (time@iis.ee.ethz.ch)

    CL ntp.dgf.uchile.cl (146.83.8.200)
    Location: Dpto. Geofísica, Universidad de Chile. Santiago, Chile.
    Geographic Coordinates: Lat: 33° 27.19'S. Lon: 70° 39.70'W. Alt: 533m.
    Synchronization: NTP V3 primary (GOES OM/DC-468 clock), SunSparc10/SunOS 4.1.3.
    Service area: REUNA and interconnected networks, Chile.
    Access Policy: open access, please send a message to notify.
    Contact: Gonzalo Pérez (gperez@dgf.uchile.cl)
    Note: ntp is an alias and the IP address may change; please use DNS.

    CZ ntp.cesnet.cz (195.113.144.201)
    Location:  CESNETPrague, The Czech Republic
    Geographic Coordinates:  50° 6.11' N, 14° 23.49' E, +252 m
    Synchronization: NTP V4 primary (Garmin GPS35), PC / Linux with nanokernel
    Service Area:  Czech Republic and Slovakia, European academic community
    Access Policy: open to servers providing synchronization to ten or more hosts, others by arrangement
    Contact: Vladimir Smotlacha (ntp-admin@cesnet.cz)
    Note: ntp is an alias and the IP address may change; please use DNS.

    DE ntp0.fau.de (131.188.3.220)
    Location: University Erlangen-Nuernberg, D-91058 Erlangen, FRG
    Geographic Coordinates: 49.573N 11.028E (from Meinberg GPS 166)
    Synchronization: NTP V3 primary (GPS receiver (<<1us)), Sun SS10/Unix SunOS 5.6
    Service Area: Germany/Europe
    Access Policy: open access, pick one of ntp{0,1,2,3}.fau.de
    Contact: The Timekeepers (time@informatik.uni-erlangen.de) Note: IP addresses are subject to change; please use DNS

    DE ntp1.fau.de (131.188.3.221)
    Location: University Erlangen-Nuernberg, D-91058 Erlangen, FRG
    Geographic Coordinates: 49.573N 11.028E (from Meinberg GPS 166)
    Synchronization: NTP V3 primary (DCF77 PZF receiver (<50us)), Sun SS10 SunOS 5.6
    Service Area: Germany/Europe
    Access Policy: open access, pick one of ntp{0,1,2,3}.fau.de
    Contact: The Timekeepers (time@informatik.uni-erlangen.de)
    Note: IP addresses are subject to change; please use DNS

    DE ntp2.fau.de (131.188.3.222)
    Location: University Erlangen-Nuernberg, D-91058 Erlangen, FRG
    Geographic Coordinates: 49.573N 11.028E (from Meinberg GPS 166)
    Synchronization: NTP V3 primary (GPS receiver (<<1us)), Sun SS10/SunOS 5.6
    Service Area: Germany/Europe
    Access Policy: open access, pick one of ntp{0,1,2,3}.fau.de
    Contact: The Timekeepers (time@informatik.uni-erlangen.de)
    Note: IP addresses are subject to change; please use DNS

    DE ntp3.fau.de (131.188.3.223)
    Location: University Erlangen-Nuernberg, D-91058 Erlangen, FRG
    Geographic Coordinates: 49.573N 11.028E (from Meinberg GPS 166)
    Synchronization: NTP V3 primary (DCF77 PZF receiver (<50us)), Sun SS10/SunOS 5.6
    Service Area: Germany/Europe
    Access Policy: open access, pick one of ntp{0,1,2,3}.fau.de
    Contact: The Timekeepers (time@informatik.uni-erlangen.de)
    Note: IP addresses are subject to change; please use DNS

    DE ntpa2.kph.uni-mainz.de (134.93.132.118)
    Location: Johannes Gutenberg-University, Institut fuer Kernphysik, Mainz, Germany
    Synchronization: NTP V3 with DCF77 receiver, K6/Linux
    Service Area: University of Mainz and all European Community Countries ONLY! Exceptions are only given to Switzerland, Poland and Czech Republic.
    Access Policy: Open access for stratum 2 servers if e-mail is sent in order to notify. Users from outside the service area will be ignored if the contact is kept alive for a longer period. Stratum >2 servers will be ignored, too. Computers, connected via dialin or computers that have unresolvable IP-numbers will be ignored from every location! Consult http://wwwa2.kph.uni-mainz.de/ntpa2/ for details!
    Contact: wwwa2@kph.uni-mainz.de

    DE ntps1-0.cs.tu-berlin.de (130.149.17.21)
    Location: Technische Universitaet Berlin, D-10587 Berlin, FRG
    Geographic Coordinates: 52.518N 13.326E
    Synchronization: NTP V3 primary (Meinberg GPS 166), Sun 4/65 SunOS4.1.3
    Service Area: Germany/Europe
    Access Policy: open access
    Contact: Gerard Gschwind (gg@cs.tu-berlin.de)

    DE ntps1-0.uni-erlangen.de (131.188.1.40)
    Location: University Erlangen-Nuernberg, D-91058 Erlangen, FRG
    Geographic Coordinates: 49.573N 11.028E (from Meinberg GPS 166)
    Synchronization: NTP V3 primary (GPS receiver (<<1us)), Sun SS2/Unix SunOS 4.1.3
    Service Area: Germany/Europe
    Access Policy: open access, pick one of ntps1-{0,1,2}.uni- erlangen.de
    Contact: Frank Kardel, Rainer Pruy (time@informatik.uni-erlangen.de)

    DE ntps1-1.cs.tu-berlin.de (130.149.17.8)
    Location: Technische Universitaet Berlin, D-10587 Berlin, FRG
    Geographic Coordinates: 52.518N 13.326E
    Synchronization: NTP V3 primary (Meinberg GPS 166), SunS10-402 SunOS5.4
    Service Area: Germany/Europe
    Access Policy: open access
    Contact: Gerard Gschwind (gg@cs.tu-berlin.de)

    DE ntps1-1.rz.Uni-Osnabrueck.DE (131.173.17.7)
    Location: University of Osnabrueck, D-49069 Osnabrueck, FRG
    Synchronization: NTP V3 primary (DCF77 clock), Sun/Unix
    Service Area: Germany/Europe
    Access Policy: open access
    Contact: Gernot Skalla (timeadm@Uni-Osnabrueck.DE)

    DE ntps1-1.uni-erlangen.de (131.188.1.45)
    Location: University Erlangen-Nuernberg, D-91058 Erlangen, FRG
    Geographic Coordinates: 49.573N 11.028E (from Meinberg GPS 166)
    Synchronization: NTP V3 primary (DCF77 PZF receiver (<50us)), Sun 4/690/SunOS 4.1.3
    Service Area: Germany/Europe
    Access Policy: open access, pick one of ntps1-{0,1,2}.uni- erlangen.de
    Contact: Frank Kardel, Rainer Pruy (time@informatik.uni-erlangen.de)

    DE ntps1-2.uni-erlangen.de (131.188.1.31)
    Location: University Erlangen-Nuernberg, D-91058 Erlangen, FRG
    Geographic Coordinates: 49.573N 11.028E (from Meinberg GPS 166)
    Synchronization: NTP V3 primary (DCF77 PZF receiver (<50us)), Sun 4/490/SunOS 4.1.3
    Service Area: Germany/Europe
    Access Policy: open access, pick one of ntps1-{0,1,2}.uni- erlangen.de
    Contact: Frank Kardel, Rainer Pruy (time@informatik.uni-erlangen.de)

    DE ptbtime1.ptb.de (192.53.103.103)
    Location: Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany
    Synchronization: NTP V3 primary (Primary standards CS1, CS2), HP9000/744/HP-UX
    Service Area: Germany/Europe, others by arrangement
    Access Policy: open access, please send a message to notify.
    Contact: Dieter Sibold, Ronald Scheffler (ntp-admin@ptb.de)0
    Note: ptbtime1.ptb.de is an alias and the IP address may change; please use DNS.

    DE ptbtime2.ptb.de (192.53.103.104)
    Location: Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany
    Synchronization: NTP V3 primary (PTB's primary standards CS1, CS2), HP9000/744/HP-UX
    Service Area: Germany/Europe, others by arrangement
    Access Policy: open access, please send a message to notify.
    Contact: Dieter Sibold, Ronald Scheffler (ntp-admin@ptb.de)
    Note: ptbtime2.ptb.de is an alias and the IP address may change; please use DNS.

    DE rustime01.rus.uni-stuttgart.de (129.69.1.153)
    Location: Computer Center University of Stuttgart, D-70550 Stuttgart, Germany
    Geographic Coordinates: 48:47N, 9:10E
    Synchronization: NTP V3 primary (Meinberg DCF-77 PZF 535/TCXO), IBM RS6000-250, AIX 4.x
    Service Area: Germany/Europe
    Access Policy: open, preferred for stratum-2 servers providing synchronization to local networks; appreciate email notification
    Contact: Walter Wehinger (wehinger@rus.uni-stuttgart.de)

    DK Denmark GPS.FreeBSD.dk (212.242.86.186)
    Location: Slagelse, Denmark
    Geographic Coordinates: 55:24:22.03N, 11:20:22.98E
    Synchronization: NTP V4 GPS with rubidium timebase
    Service Area: As network paths make it sensible
    Access Policy: open access to servers, please, no client use
    Contacts: Poul-Henning Kamp (phk@FreeBSD.org)
    Note: timestamps better than +/-50 nsec

    DK Denmark GPS.dix.dk (192.38.7.240)
    Location: Lyngby, Denmark
    Geographic Coordinates: 55:47:03.36N, 12:03:21.48E
    Synchronization: NTP V4 GPS with OCXO timebase
    Service Area: Networks BGP-announced on the DIX
    Access Policy: open access to servers, please, no client use
    Contacts: Poul-Henning Kamp (phk@FreeBSD.org)
    Note: timestamps better than +/-5 usec.

    FR canon.inria.fr (192.93.2.20)
    Location: INRIA, Rocquencourt (near Paris), France
    Synchronization: NTP V3 primary (GPS), Datum TymServe 2100L
    Service Area: France/Europe
    Access Policy: open access, please send a message to notify
    Contact: ntp-adm@inria.fr
    Note: We use a Datel RCH208 clock with SER024 V24 interface.

    FR chronos.cru.fr
    Location: University of Rennes 1, Britany, France
    Synchronization: NTP V3, Datum TymServe 2100L with GPS
    Service Area: France/Europe
    Access Policy: open access to stratum-2 servers, send a message to notify
    Contact: timemaster@cru.fr
    Note: use DNS for IP address

    FR ntp-p1.obspm.fr
    Location: LPTF - Observatoire de Paris, France
    Synchronization: NTP V3, Datum TymServe 2100 with 1PPS
    Service Area: France/Europe
    Access Policy: open access to stratum-2 servers, send a message to notify
    Contact: lptfop@obspm.fr
    Note: use DNS for IP address. Ref: 1PPS from Atomic Clock

    FR ntp-sop.inria.fr (138.96.64.10)
    Location: INRIA, Sophia Antipolis (French Riviera, near Nice), France
    Synchronization: NTP V3 primary (GPS), PC/Linux
    Service Area: RENATER, R3T2, France/Europe
    Access Policy: open access, please send a message to notify
    Contact: ntp-adm@sophia.inria.fr, More help?
    Note: We use a MC2 Starsync GPS EISA card

    HK clock.cuhk.edu.hk (137.189.6.18)
    Location: The Chinese University of Hong Kong.
    Geographic Coordinates: 22:25:10N,114:12:22E
    Synchronization: NTP V3 Primary (TSS-100 GPS clock)
    Service Area: Hong Kong, China & South East Asia
    Access Policy: open access
    Contact: Connie Law (connieL@cuhk.edu.hk), KM Fung (kinming@cuhk.edu.hk) Note: IP addresses are subject to change; please use DNS

    IT tempo.cstv.to.cnr.it (150.145.33.1)
    Location: CSTV of National Research Council, Torino, Italy
    Geographic Coordinates: 45:00:54N, 7:38:20.7E, 306.6H
    Syncronization: NTP V3 primary (IEN CTD clock), DecSystem 5500/Ultrix 4.4
    Service Area: Italy/Europe
    Access Policy: open access
    Contact: Fabrizio Pollastri (pollastri@cstv.to.cnr.it)
    Note: information at http://www.cstv.to.cnr.it/toi

    IT time.ien.it (193.204.114.1)
    Location: IEN Galileo Ferraris, Torino, Italy
    Synchronization: NTP primary (Cesium Beam Frequency Standard), Sun/Unix
    Service Area: Italy/Europe
    Access Policy: open access
    Contact: denasi@ien.it

    JP clock.nc.fukuoka-u.ac.jp (133.100.9.2)
    Location: Fukuoka university, Fukuoka, Japan
    Geographic Coodinates: 130:21.81E, 33:32.87N
    Synchronization: NTP V3.3 primary (GPS clock), Heliostation 400/SunOS 4.1.3
    Service Area: Japan/Pacific area
    Access Policy: open access
    Contact: TSURUOKA Tomoaki (tsuruoka@fukuoka-u.ac.jp), YOSHIMURA Kenji (yosimura@tl.fukuoka-u.ac.jp)
    Note: We use a TRAK 8810 GPS STATION CLOCK and a Furuno Electric Co.'s GN-72 GPS receiver respectively.

    JP clock.tl.fukuoka-u.ac.jp (133.100.11.8)
    Location: Fukuoka university, Fukuoka, Japan
    Geographic Coodinates: 130:21.81E, 33:32.87N
    Synchronization: NTP V3.3 primary (GPS clock), Heliostation 400/SunOS 4.1.3
    Service Area: Japan/Pacific area
    Access Policy: open access
    Contact: TSURUOKA Tomoaki (tsuruoka@fukuoka-u.ac.jp), YOSHIMURA Kenji (yosimura@tl.fukuoka-u.ac.jp)
    Note: We use a TRAK 8810 GPS STATION CLOCK and a Furuno Electric Co.'s GN-72 GPS receiver respectively.

    MX cronos.cenam.mx
    Location: Centro Nacional de Metrologia, Queretaro, Mexico
    Geographic coordinates: 20:32:9.6 N, 100:16:18 W, +1912
    Synchronization: Interlock algorithm with direct 1 pps from primary
    frequency standard of CENAM, UTC(CENAM)
    Service Area: All Mexico and USA
    Access policy: Open access
    Contact: J. Mauricio Lopez R., jlopez@cenam.mx , 52 4 211 0543

    NL ntp0.nl.net (193.67.79.202)
    Location: NLnet, Amsterdam, The Netherlands
    Synchronization: NTP primary (GPS), Sun/Unix SunOS 4.1.3
    Service Area: The Netherlands/Europe
    Access Policy: open access
    Contact: beheer@nl.net

    NL ntp1.nl.net (193.79.237.14)
    Location: NLnet, Amsterdam, The Netherlands
    Synchronization: NTP primary (GPS), Sun/Unix SunOS 4.1.3
    Service Area: The Netherlands/Europe
    Access Policy: open access
    Contact: beheer@nl.net

    NL ntp2.nl.net (193.79.237.30)
    Location: NLnet, Amsterdam, The Netherlands
    Synchronization: NTP primary (GPS), Sun/Unix SunOS 4.1.3
    Service Area: The Netherlands/Europe
    Access Policy: open access
    Contact: beheer@nl.net

    NO time.service.uit.no
    Location: The EDB Centre, University of Tromsoe, Norway
    Synchronization: NTP V3 primary (GPS clock), HP-UX/Unix
    Service Area: NORDUnet
    Access Policy: semi-open access, prior arrangment required
    Contact: (timekeeper@uit.no)

    NZ clock1.canterbury.ac.nz (132.181.12.13)
    Location: Computer Science Department, University of Canterbury
    Synchronization: NTP V4 primary (Trimble Palisade GPS), Sun/Sparc
    Service Area: New Zealand
    Access Policy: restricted to stratum-2 servers providing synchronization to local networks of ten or more hosts, by prior arrangement
    Contact: Pete Glassenbury (pete@cosc.canterbury.ac.nz)
    Note: IP addresses are subject to change; please use DNS

    PL ntp.certum.pl (212.244.2.172)
    Location: Unizeto Sp. z o.o., ul. Krolowej Korony Polskiej 21-23, 70-486 Szczecin
    Geographic Coordinates: 53:26:15N 014:31:58E
    Synchronization: NTP V4 primary (Meinberg GPS 167/PPS/TGP), Linux
    Service Area: Poland/Europe
    Access Policy: open access
    Contact: Wojtek Slusarczyk (wojtek@certum.pl)

    PL vega.cbk.poznan.pl (150.254.183.15)
    Location: Astrogeodynamical Observatory, Space Research Centre, Borowiec, Poland
    Synchronization: NTP V3 primary (Caesium clock), PC Pentium, RedHat Linux
    Service Area: Poland/Europe
    Access Policy: open access
    Contact: Robert Diak (kondor@cbk.poznan.pl), Jerzy Nawrocki (nawrocki@cbk.poznan.pl)

    SE ntp1.sp.se (62.119.40.98)
    Location: SP Swedish National Testing and Research Institute, BORAS, SWEDEN
    Synchronization: NTP V4 primary (UTC(SP) Swedish National Time Scale), FreeBSD
    Service Area: all areas
    Access Policy: open access
    Contact: Kenneth Jaldehag info@sp.se

    SE ntp2.sp.se (62.119.40.99)
    Location: SP Swedish National Testing and Research Institute, BORAS, SWEDEN
    Synchronization: NTP V4 primary (UTC(SP) Swedish National Time Scale), FreeBSD
    Service Area: all areas
    Access Policy: open access
    Contact: Kenneth Jaldehag info@sp.se

    SE time1.stupi.se (192.36.143.150)
    Location: Stupi AB, Stockholm, SWEDEN
    Synchronization: NTP V3 primary (Saphir Cesium Beam Standard/GPS), BSDI Unix
    Service Area: SUnet, NORDUnet
    Access Policy: open access
    Contact: Peter Lothberg (roll@Stupi.SE)

    SE time2.stupi.se (192.36.143.151)
    Location: Stupi AB, Stockholm, SWEDEN
    Synchronization: NTP V4 primary (HP5071, FreeBSD)
    Service Area: Europe
    Access Policy: open access
    Contact: roll@stupi.se (Peter Lothberg)

    SG jamtepat.singnet.com.sg (165.21.110.7)
    Location: SingNet, Singapore
    Geographic Coordinates: 1.292N 103.808E (GPS WGS84)
    Synchronization: Datum Tymserve 2100-GPS
    Service Area: STIX/Asia (outside Singapore), others by arrangement
    Access Policy: port access granted by arrangement
    Contact: timekeeper@singnet.com.sg

    SI goodtime.ijs.si (193.2.4.2)
    Location: J. Stefan Institute, Ljubljana, Slovenia
    Geographic Coordinates: 46° 2.517' N, 14° 29.241' E, +363 m (WGS84)
    Synchronization: NTP V4 primary (Trimble Palisade GPS), Compaq (DEC) Alpha / Tru64 Unix with MICRO_TIME kernel option
    Service Area: Slovenia, European academic community, others by arrangement
    Access Policy: restricted to servers providing synchronization to ten or more hosts, please send notification before regular use
    Contact: Mark Martinec (timekeeper@ijs.si); More info?
    Note: NTP V4 clients preferred for their lower load and better accuracy; IP address subject to change

    UK chronos.csr.net 194.35.252.7 (CNAME ntp.csr.net)
    Location: Computing Systems Research Ltd. United Kingdom
    Geographic Coordinates: 0:49:10W 52:14:54N (480578m 261841m)
    Synchronization: NTP V4 primary (Odetics GPS), Sun/Sparc Solaris 2.6
    Service Area: United Kingdom Western Europe
    Access Policy: open access
    Contact: C Buckingham (chrisb@csr.net)

    UK ntp2.ja.net (193.63.94.26)
    Location: University of London Computer Centre, UK
    Synchronization: NTP V3 primary (MSF clock), Sun/Unix
    Service Area: JANET
    Access Policy: closed access, see notes below.
    Contact: jips-nosc@nosc.ja.net
    Note: This server is part of the JANET NTP service and is available for JANET stratum-2 clients and for peering with external stratum-1 clocks. Any external stratum-1 peering requests should be emailed to the Contact address.

    US AK ntp.alaska.edu (199.165.76.11) (CNAME ntp-ua.usno.navy.mil)
    Location: University of Alaska, Fairbanks, AK (147 50 59.7W 64 51 27.3N WGS84)
    Synchronization: NTP V3 primary (GPS)
    Service area: Pacific Northwest, others by arrangement
    Access Policy: open access for stratum 2 servers
    Contact: Rich Schmidt, US Naval Observatory (res@tuttle.usno.navy.mil)

    US CA clepsydra.dec.com (16.1.0.4, 204.123.2.5)
    Location: DEC Western Research Laboratory, Palo Alto, CA
    Synchronization: NTP V3 primary (GPS clock), PC/BSDI 2.1
    Service Area: NSFNET, BARR region
    Access Policy: open access, send email to notify before using
    Contact: ntp-admin@pa.dec.com
    Note: The host name is an alias used only for time service.

    US CA clock.isc.org (192.5.5.250)
    Location: Internet Software Consortium, Palo Alto, CA
    Geographic Coordinates: 122 9 41 W / 37 26 35 N
    Synchronization: NTP primary (GOES clock), BSD UNIX
    Service Area: BARRnet, Alternet-west, CIX-west
    Access Policy: open access
    Contact: Paul Vixie (paul@vix.com)

    US CA clock.sgi.com (192.48.153.74)
    Location: Silicon Graphics Computer Systems, Inc., Mountain View, CA
    Synchronization: NTP V3 primary (TrueTime 600 GPS/Precision Standard
    Time WWV), SGI Challenge L/Irix
    Service Area: North America
    Access Policy: open to stratum-2 time servers, others by arrangement.
    Contact: Bowen Goletz, ( ntp-admin@sgi.com)

    US CA clock.via.net (209.81.9.7)
    Location: ViaNet Communications, Palo Alto, CA, USA
    Synchronization: NTP V3 with Trimble Pasisade GPS receiver/FreeBSD
    Service Area: All areas
    Access Policy: open access
    Contact: Joe McGuckin (joe@via.net)

    US CA gpstime.trimble.com 206.40.88.30
    Location: Sunnyvale, CA US
    Synchronization: NTP primary (GPS clock), Trimble Palisade on Windows NT 4.0
    Service Area: Western US
    Access Policy: open access, stratum 3 or higher requested
    Contact: Sven Dietrich, sven_dietrich@trimble.com or zane_brady@trimble.com

    US CA montpelier.ilan.caltech.edu (131.215.254.2) CNAMES: montpelier.caltech.edu, ntp-caltech.usno.navy.mil
    Location: California Institute of Technology, Pasadena, CA
    Synchronization: NTP V3 primary (GPS clock)
    Service area: USA Pacific timezone, others by arrangement
    Access Policy: open access for stratum 2 servers
    Contacts: Rich Schmidt, US Naval Observatory (res@tuttle.usno.navy.mil),
    Heather Sherman, California Institute of Technology, (network@caltech.edu)

    US CA nist1.aol-ca.truetime.com (207.200.81.113)
    Location: AOL Time Warner facility, Sunnyvale, California
    Synchronizaton: Lockclock Algorithm and ACTS dial-up, GPS-stabilized oscillator for short-term stabilization
    Service Area: Western US
    Access Policy: Open access for up to 20 queries per hour (one-day average) from any one address, others by arrangment
    Contact: Judah Levine, jlevine@boulder.nist.gov, 303 492 7785

    US CA nist1.datum.com (63.149.208.50)
    Location: Datum Inc., Bancomm-Timing Division, San Jose, California
    Synchronization: ACTS dial-up using lockclock algorithm; DEC Alpha UNIX
    Service Area: Primarily networks in Western US
    Access Policy: Open to stratum-2 servers and others by arrangement.
    Contact: Judah Levine (jlevine@boulder.nist.gov) 303 492-7785

    US CA nist1-sj.glassey.com (207.126.103.204)
    Location: Abovenet, San Jose, California
    Synchronization: ACTS dial-up using lockclock algorithm; DEC Alpha UNIX
    Service Area: Western US
    Access Policy: Open to stratum-2 servers and others by arrangement
    Contact: Judah Levine (jlevine@boulder.nist.gov) 303 492-7785

    US CA ntp-cup.external.hp.com (192.6.38.127)
    Location: Cupertino CA (SF Bay area) 37:20N/122:00W
    Synchronization: NTPv3 primary, HP-UX/Palisade-GPS
    Service Area: West Coast USA
    Access Policy: open access
    Contact: timer@cup.hp.com
    Note: no need to notify for access, go right ahead!

    US CA ntp.nasa.gov (143.232.55.5)
    Location: NASA Ames Research Center, Moffett Field, CA
    Synchronization: NTP primary (WWVB clock), Sun/Unix
    Service Area: NSFNET, BARR region, NASA NSN, DOE ESNET, DDN
    Access Policy: prior permission required
    Contact: clockmaster@ntp.nasa.gov

    US CA tick.gpsclock.com (216.152.68.16)
    Location: GPSClock.com headquarters, San Jose, CA
    Geographic Coordinates: 37:16:37N, 121:53:31W
    Synchronization: NTP V4 primary, GPSClock model 200 hard PPS, Linux
    Service Area: US Pacific, Abovenet/PAIX region
    Access Policy: Open to stratum 2 servers for 10 or more hosts, others upon request
    Contacts: David Schwartz (clock@gpsclock.com)

    US CA tick.ucla.edu (164.67.62.194) CNAMEs: navobs1.ucla.edu, time.ucla.edu
    Location: UCLA, Los Angeles, CA
    Synchronization: NTP V3 primary (GPS) HP9000/747i
    Service area: Pacific time zone, others on request
    Access policy: open access to stratum-2 servers and to UCLA clients
    Contacts: Rich Schmidt (res@tuttle.usno.navy.mil), Scott Burris (scott@cns.ucla.edu)

    US CA timekeeper.isi.edu (128.9.176.30)
    Location: USC Information Sciences Institute, Marina del Rey, CA
    Geographic Coordinates: 33:58:49N, 118:26:20W (USGS map NAD27)
    Synchronization: NTP V3 primary Datum Tymserve 2100-GPS
    Service Area: CalRen2, Los Nettos region
    Access Policy: open access
    Contact: Information Processing Center (action@isi.edu)

    US CA tock.gpsclock.com (216.152.68.20)
    Location: GPSClock.com headquarters, San Jose, CA
    Geographic Coordinates: 37:16:37N, 121:53:31W
    Synchronization: NTP V3 primary, GPSClock model 200 hard PPS, FreeBSD
    Service Area: US Pacific, Abovenet/PAIX region
    Access Policy: Open to stratum 2 servers for 10 or more hosts, others upon request
    Contacts: David Schwartz (clock@gpsclock.com)

    US CA usno.pa-x.dec.com (204.123.2.72) CNAME: navobs1.pa-x.dec.com
    Location: Systems Research Center, Compaq Computer Corp. Palo Alto, CA (122 9 41.7 W 37 26 42.6 N WGS84)
    Synchronization: NTP V3 primary (GPS)
    Service area: USA Pacific and Mountain timezones, others by arrangement.
    Access Policy: open access
    Contact: Rich Schmidt, US Naval Observatory (res@tuttle.usno.navy.mil) Paul Flaherty, Digital Equipment Corp.(flaherty@pa.dec.com)

    US CO navobs1.usnogps.navy.mil (204.34.198.40) CNAME: tick.usnogps.navy.mil
    Location: Falcon AFB, Colorado
    Geographic Coordinates: 104 31 30 W, 38 48 30 N WGS84
    Synchronization: NTP V3 primary (USNO Alternate Master Clock H-maser) HP9000/747i
    Service area: USA Pacific and Mountain timezones, others by arrangement.
    Access Policy: open access
    Contact: Rich Schmidt, US Naval Observatory (res@tuttle.usno.navy.mil)

    US CO navobs2.usnogps.navy.mil (204.34.198.41) CNAME: tock.usnogps.navy.mil
    Location: Falcon AFB, Colorado
    Geographic Coordinates: 104 31 30 W, 38 48 30 N WGS84
    Synchronization: NTP V3 primary (USNO Alternate Master Clock H-maser) HP9000/747i
    Service area: USA Pacific and Mountain timezones, others by arrangement.
    Access Policy: open access
    Contact: Rich Schmidt, US Naval Observatory (res@tuttle.usno.navy.mil)

    US CO time-a.nist.gov (129.6.15.28) New Access policy: Open only to existing users; other users please use time-b or time-c instead.

    US CO time-a.timefreq.bldrdoc.gov (132.163.135.130, 132.163.4.101)
    Location: NIST Boulder Laboratories, Boulder, Colorado
    Synchronization: Direct 1 pps from clock ensemble; lockclock algorithm and ACTS dial-up as backup; DEC Alpha/UNIX
    Service Area: NSFnet, WESTnet
    Access Policy: Open to stratum-2 servers, others by arrangement; please use only one of the servers as primary with the other as a backup.
    Contact: Judah Levine (jlevine@time.nist.gov) 303 492 7785.

    US CO time-b.timefreq.bldrdoc.gov (132.163.135.131, 132.163.4.102)
    Location: NIST Boulder Laboratories, Boulder, Colorado
    Synchronization: Direct 1 pps from clock ensemble; lockclock algorithm and ACTS dial-up as backup; DEC Alpha/UNIX
    Service Area: NSFnet, WESTnet
    Access Policy: Open to stratum-2 servers, others by arrangement; please use only one of the servers as primary with the other as a backup.
    Contact: Judah Levine (jlevine@time.nist.gov) 303 492 7785

    US CO time-c.timefreq.bldrdoc.gov (132.163.135.132, 132.163.4.103)
    Location: NIST Boulder Laboratories, Boulder, Colorado
    Synchronization: Direct 1 pps from clock ensemble; lockclock algorithm and ACTS dial-up as backup; DEC Alpha/UNIX.
    Service Area: NSFnet, WESTnet
    Access Policy: Open to servers with at least 10 clients; others by arrangement. please use only one of these servers primary with the other as backup.
    Contact: Judah Levine (jlevine@time.nist.gov) 303 492 7785.

    US CO time-d.timefreq.bldrdoc.gov (132.163.135.133, 132.163.4.104)
    Location: NIST Boulder Laboratories, Boulder, Colorado
    Synchronization: interlock algorithm with direct 1 pps from clock ensemble as backup; DEC Alpha/UNIX.
    Service Area: NSFnet, WESTnet
    Access Policy: Used for testing and algorithm development. NOT for general use.
    Contact: Judah Levine (jlevine@time.nist.gov) 303 492 7785

    US CO time.nist.gov (192.43.244.18)
    Location: National Center for Atmospheric Research, Boulder, Colorado
    Geographic Coordinates: 39:58:43.44N 254:43:32.5E +1840m (WGS 84)
    Synchronization: ACTS dial-up with NTP backup, DEC Alpha UNIX Service Area: NSFnet, WESTnet
    Access Policy: open to stratum-2 servers and others by arrangement
    Contact: Judah Levine (jlevine@time.nist.gov), (303) 492-7785

    US CO utcnist.colorado.edu (128.138.140.44)
    Location: JILA Laboratory, University of Colorado
    Synchronization: ACTS dial-up using lockclock algorithm; DEC Alpha UNIX
    Service Area: Western US
    Access Policy: Open to All Colorado users, other stratum-2 servers; others by arrangement
    Contact: Judah Levine (jlevine@boulder.nist.gov) 303 492-7785

    US DC ntp2.usno.navy.mil (192.5.41.209)
    Location: U.S. Naval Observatory, Washington, DC
    Geographic Coordinates: 77 03 57.7W 38 55 14.1N WGS84
    Synchronization: NTP V3 primary (USNO Master Clocks 1,2, and GPS)
    Service area: USA Eastern timezone, others by arrangement
    Access Policy: open access for stratum 2 servers
    Contact: Rich Schmidt, US Naval Observatory (res@tuttle.usno.navy.mil)

    US DC tick.usno.navy.mil (192.5.41.40)
    Location: U.S. Naval Observatory, Washington, DC
    Geographic Coordinates: 38:55:14.01 77:03:58.03 (GPS WGS84)
    Synchronization: NTP V3 primary (USNO Master Clock 2, H-maser), HP9000/747i
    Service Area: NSFNET
    Access Policy: open access
    Contact: Rich Schmidt (res@tuttle.usno.navy.mil)

    US DC tock.usno.navy.mil (192.5.41.41)
    Location: U.S. Naval Observatory, Washington, DC
    Geographic Coordinates: 38:55:14.01 77:03:58.03 (GPS WGS84)
    Synchronization: NTP V3 primary (USNO Master Clock 2, H-maser), HP9000/747i
    Service Area: NSFNET
    Access Policy: open access
    Contact: Rich Schmidt (res@tuttle.usno.navy.mil)

    US DE mizbeaver.udel.edu (128.4.1.2)
    Location: University of Delaware, Newark, DE
    Geographic Coordinates: 39:40:48.425N, 75:45:02.392W (GPS WGS84)
    Synchronization: NTP V4 primary (GPS clock), TrueTime NTS-200-GPS
    Service Area: CAIRN, Abilene/vBNS
    Access Policy: closed access, except for stratum-2 servers providing synchronization to local networks of ten or more hosts
    Contact: Dave Mills <mills@udel.edu>
    Note: This server does not implement the NTP control-message protocol

    US DE ntp1.connectiv.com (138.39.7.20)
    Location: Conectiv Inc., Newark DE
    Synchronization: NTP primary (GPS clock), Odetics GPS Receiver and Sun Sparc 5
    Service area: AT&T and QWEST
    Access policy: open access
    Contact: John K. Scoggin (john.scoggin@conectiv.com)

    US DE ntp1.nss.udel.edu (128.175.60.175)
    Location: University of Delaware, Newark, DE
    Geographic Coordinates: 39:40:35.8N, 75:44:36.6W (GPS WGS 84)
    Synchronization: NTP V3 Primary (GPS clock), TrueTime NTS-100-GPS
    Service Area: BBN Planet SER
    Access Policy: closed access, except for stratum-2 servers providing synchronization to local networks of ten or more hosts
    Contact: Ron Reisor (ron@udel.edu)
    Note: This server does not implement the NTP control-message protocol.

    US DE rackety.udel.edu (128.4.1.1)
    Location: University of Delaware, Newark, DE
    Geographic Coordinates: 39:40:48.425N, 75:45:02.392W (GPS WGS84)
    Synchronization: NTP V4 primary (GPS clock), Sun IPC/SunOS 4.1.3
    Service Area: CAIRN, Abilene/vBNS
    Access Policy: closed access, except for stratum-2 servers providing synchronization to local networks of ten or more hosts
    Important: From 1 May 2001 service is restricted to NTP Version 4 clients only.
    Contact: Dave Mills <mills@udel.edu>

    US GA time.twc.weather.com (216.133.140.77)
    Location: The Weather Channel, Atlanta GA
    Geographic Coordinates: 33:53:39.94N, 84:27:47.98W
    Synchronization: NTP V4 primary (CMDA), Sun/Solaris
    Servcice Area: Primarily Southeastern US
    Access policy: Open access for stratum 2 servers
    Contact: NTP Administrator
    Note: IP addresses are subject to change; please use DNS Important: Access policies subject to change if server is overloaded or abused. No access for dial-up or DHCP systems.

    US FL ntp-s1.cise.ufl.edu (128.227.205.3) (CNAME ntp- ufl.usno.navy.mil)
    Location: University of Florida, Gainesville, FL
    Synchronization: NTP V3 primary (TrueTime GPS-VME)
    Service area: Eastern time zone US
    Access Policy: open access for stratum 2 servers and UFL clients,others by arrangement
    Contacts: Rich Schmidt, US Naval Observatory
    CISE, Univ. Florida

    US GA navobs1.gatech.edu (130.207.244.240) CNAMES: tick.gatech.edu, ntp-gatech.usno.navy.mi
    Location: Georgia Institute of Technology, Atlanta, GA
    Geographic Coordinates: 84 23 40.9W 33 46 30.0N WGS84
    Synchronization: NTP V3 primary (GPS clock)
    Service area: USA Eastern timezone, others by arrangement
    Access Policy: open access for stratum 2 servers
    Contacts: Rich Schmidt, US Naval Observatory (res@tuttle.usno.navy.mil),
    Ray Spalding, Georgia Institute of Technology, (cc100aa@xray.oit.gatech.edu)

    US IL ntp0.mcs.anl.gov (140.221.8.88) (CNAME ntp- anl.usno.navy.mil)
    Location: Argonne National Laboratories, Chicago, IL
    Synchronization: NTP V3 primary (Brandywine Syncclock32/Oncore GPS)
    Service area: Central time zone US
    Access Policy: open access for stratum 2 servers and ANL clients,others by arrangement
    Contacts: Rich Schmidt, US Naval Observatory Bill Nickless, Argonne National Labs

    US IL truechimer.cso.uiuc.edu (128.174.5.58)
    Location: University of Illinois, Urbana-Champaign, IL
    Synchronization: NTP V3 primary (WWVB clock), IBM-RS6000/250
    Service Area: CICNET, Midwest, NCSA region
    Access Policy: closed access except for peers that meet the three conditions outlined in the "Time Servers" section of this file. State agreement with those conditions in notification message. All others may use the ntp-{0,1,2}.cso.uiuc.edu stratum 2 servers.
    Contact: Charley Kline (kline@uiuc.edu)
    Note: truechimer is a DNS CNAME. The host with the WWVB clock will always have the truechimer alias.

    US IN darkcity.cerias.purdue.edu(128.10.252.7)
    Location: CERIAS, Purdue University, West Lafayette, IN
    Synchronization: NTP primary (GPS), Datum TymServe 2100L
    Service Area: Indiana
    Access Policy: open access, please send a message to notify
    Contact: Gene Spafford ( spaf@cerias.purdue.edu)

    US HI tick.mhpcc.edu (164.122.7.123) (CNAME: ntp-mhpcc.usno.navy.mil)
    Location: Maui High Performance Computing Center
    Geographic Coordinates: 20 44.9286 N, 156 26.4070 W
    Synchronization: NTP V3 primary (Brandywine/Motorola Oncore GPS)
    Service area: Hawaii, others on request
    Access Policy: open access for stratum 2 servers
    Contacts: Rich Schmidt (res@tuttle.usno.navy.mil), MHPCC NTP administrator (ntp@mhpcc.edu)

    US MA bonehed.lcs.mit.edu (18.26.4.105)
    Location: Massachusetts Institute of Technology, Cambridge, MA
    Synchronization: Motorola Oncore UT+ GPS, xntp3-5.90, FreeBSD 3.2
    Service Area: Eastern US
    Access Policy: open access
    Contact: Robert Morris (rtm@lcs.mit.edu)

    US MA tick.mit.edu (18.145.0.30) CNAME: navobs1.mit.edu
    Location: Massachusetts Institute of Technology, Cambridge, MA
    Synchronization: NTP V3 primary (GPS) HP9000/747i
    Service Area: eastern time zone, others on request
    Access Policy: open access to stratum-2 servers and to MIT clients
    Contacts: Rich Schmidt (res@tuttle.usno.navy.mil)

    US MD time-b.nist.gov (129.6.15.29)
    Location: NIST Central Computer Facility, Gaithersburg, Maryland
    Synchronization: ACTS dial-up using lockclock algorithm, DEC Alpha/UNIX
    Service Area: NSFnet, SURAnet
    Access Policy: Open to stratum-2 servers, others by arrangement; please use one of the servers as primary with the other as a backup.
    Contact: Judah Levine (jlevine@time.nist.gov) 303 492 7785

    US MD umd1.umd.edu (128.8.10.1)
    Location: University of Maryland, College Park, MD
    Synchronization: NTP V3 primary (WWVB clock), Fuzzball
    Service Area: NSFNET, SURA region
    Access Policy: closed access, except for stratum-2 servers providing synchronization to local networks of ten or more hosts
    Contact: Michael Petry (petry@ni.umd.edu)

    US ME ntp.colby.edu (137.146.210.250) (CNAME ntp-colby.usno.navy.mil)
    Location: Colby College, Waterville, ME
    Geographic Coordinates: 69 39 42.0 W, 44 33 48 N WGS84
    Synchronization: NTP V3 primary (GPS)
    Service area: Northeastern US & Canada, others by arrangement
    Access Policy: open access for stratum 2 servers
    Contacts: Rich Schmidt, US Naval Observatory (res@tuttle.usno.navy.mil), Jeff Earickson, Colby College (jaearick@colby.edu)
    Note: IP addresses are subject to change; please use DNS.

    US MO navobs1.wustl.edu (128.252.19.1) CNAME: tick.wustl.edu
    Location: Washington University, St. Louis, MO
    Synchronization: NTP V3 primary (GPS) HP9000/747i
    Service area: USA Central timezone, others by arrangement.
    Access Policy: open access
    Contact: Rich Schmidt,US Naval Observatory (res@tuttle.usno.navy.mil)

    US NC ncnoc.ncren.net (192.101.21.1)
    Location: MCNC, Research Triangle Park, NC
    Synchronization: NTP V3 primary (WWVB clock), Netclock/2, Sun 4/65
    Service area: NC-REN region
    Access Policy: NC-REN region, other use by prior arrangement
    Contact: Tim Seaver (tas@ncren.net, clockmaster@ncren.net)

    US NC terrapin.csc.ncsu.edu 152.1.58.124
    Location: North Carolina State University, Raleigh, NC
    Synchronization: NTP primary (GPS clock), Trimble Palisade
    Service Area: South Eastern US
    Access Policy: open access
    Contact: Sven Dietrich, NCSU, sven@terrapin.csc.ncsu.edu

    US NY nist1-ny.glassey.com (208.184.49.9)
    Location: Abovenet, New York City, New York
    Synchronization: ACTS dial-up using lockclock algorithm; DEC Alpha UNIX
    Service Area: North Eastern US
    Access Policy: Open to stratum-2 servers and others by arrangement
    Contact: Judah Levine (jlevine@boulder.nist.gov) 303 492-7785

    US OH lerc-dns.lerc.nasa.gov (128.156.1.43)
    Location: NASA Lewis Research Center, Cleveland, OH
    Synchronization: NTP Primary (WWVB clock), Sun/Unix Service Area: NSFNET, OARNET
    Access Policy: open access
    Contact: Joe Rossoll (yyjer@scivax.lerc.nasa.gov)

    US OK now.okstate.edu (139.78.100.163) CNAME: ntp-okstate.usno.navy.mil
    Location: Oklahoma State University, Stillwater, OK
    Geographic Coordinates: 97 04 17.0 W, 36 07 19.7 N  WGS84
    Synchronization: NTP V3 primary (TrueTime GPS-VME)
    Service area: Central Time Zone, others by arrangement
    Access Policy: open access
    Contacts: Rich Schmidt, US Naval Observatory (res@tuttle.usno.navy.mil), Matthew Collier, Oklahoma State University (mwc@okstate.edu)

    US PA gps1.otc.psu.edu (128.118.25.12)
    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 primary (GPS), TrueTime XL/DC NTP module
    Service Area: Internet2, vBNS, CERFnet(AT& T IP Services), PSC/NCNE, CASC.
    Access Policy: closed access, except for stratum-2 servers providing synchronization to local networks of ten or more hosts; others by arrangement only
    Contact: John Balogh <JDB@psu.edu>
    Note: the IP address for gps1.otc.psu.edu may change; please use DNS. This hardware does not support rdate or daytime protocols; NTPv3 only.

    US PA otc1.psu.edu (128.118.46.3)
    Location: Penn State University, University Park, PA
    Synchronization: NTP V3 primary (WWV clock), Sun/Unix
    Service Area: NSFNET, PREPNET, JvNCnet
    Access Policy: open access
    Contact: John Balogh (JohnBalogh@psu.edu) (no longer: jdb@ecl.psu.edu)

    US PA wwv.otc.psu.edu (128.118.46.3)
    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 primary (Traconex/PSTI-1020 WWV clock), 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: wwv.otc.psu.edu is the CNAME for this service. The IP address WILL change sometime after mid-year 1999; please use DNS.

    US TX tick.uh.edu (129.7.1.66) CNAME: time.uh.edu
    Location: University of Houston, Houston, TX
    Geographic Coordinates: 29:43:37N,95:20:22W
    Synchronization: NTP V3 primary (GPS) HP9000/747i
    Service Area: US Central time zone, others on request
    Access Policy: open access to stratum-2 servers and to UH clients
    Contacts: Rich Schmidt (res@tuttle.usno.navy.mil), Alan Pfeiffer- Traum (apt@uh.edu)

    US VA: nist1.aol-va.truetime.com (205.188.185.33)
    Location: AOL Time Warner facility, Dulles, Virginia
    Synchronization: Lockclock Algorithm and ACTS dial-up, GPS-stabilized oscillator for short-term stabilization
    Service Area: Eastern US
    Access Policy: Open access for up to 20 queries per hour (one-day average) from any one address, others by arrangement
    Contact: Judah Levine, jlevine@boulder.nist.gov, 303 492 7785

    US VA nist1-dc.glassey.com (216.200.93.8)
    Location: Abovenet, Vienna, VA
    Synchronization: ACTS dial-up using lockclock algorithm; DEC Alpha UNIX
    Service Area: Primarily networks in Eastern US
    Access Policy: Open to stratum-2 servers and others by arrangement.
    Contact: Judah Levine (jlevine@boulder.nist.gov) 303 492-7785

    US WA bigben.cac.washington.edu 140.142.16.34 (CNAME ntp-wu.usno.navy.mil)
    Location: University of Washington, Seattle, WA
    Synchronization: NTP primary (GPS clock), HP9000/747i HPUX
    Service Area: Pacific Northwest
    Access Policy: open access to Pacific Time Zone stratum 2's and to Univ. of Washington clients; others by arrangement
    Contact: Rich Schmidt, USNO, res@tuttle.usno.navy.mil, Bill Mar, Univ. of Washington (bmar@cac.washington.edu)

    US WA time-nw.nist.gov (131.107.1.10)
    Location: Microsoft Corporation, Redmond, Washington
    Synchronization: ACTS Dial-up and lockclock algorithm, DEC Alpha/UNIX
    Service Area: NorthWestNet, NSFnet
    Access policy: open to stratum-2 servers and others by arrangement.
    Contact: Judah Levine (jlevine@time-a.timefreq.bldrdoc.gov) (303) 492-7785

    US WI ben.cs.wisc.edu (128.105.201.11)
    Location: Computer Science Department, University of Wisconsin-Madison
    Geographic Coordinates: 89:24:30W, 43:08:00N
    Synchronization: NTP V4 primary (Odetics GPS), Sun/Sparc
    Service Area: US/any
    Access Policy: One primary and one secondary per domain, by request
    Contact: David Thompson ( ntp-admin@cs.wisc.edu)
    Note: IP addresses are subject to change; please use DNS

Discontinued Service

bitsy.mit.edu
chronos.univ-rennes1.fr
clock.llnl.gov
clock.osf.org
fuzzy.nta.no
ntp.cc.utexas.edu
ntp.marine.csiro.au
ntp.quidnet.com ntp.syd.dms.csiro.au
ntp.tip.csiro.au
ntp0.sdd.hp.com
ntp0.ja.net
ntp1.sony.com
utcnist1.reston.mci.net
wave.mbari.org
wwvb.erg.sri.com
wwvb.isi.edu
wwwa2.kph.uni-mainz.de
y2k-test.timefreq.bldrdoc.gov

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