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NTP users are strongly urged to take immediate action to ensure that their NTP daemons are not susceptible to being used in distributed denial-of-service (DDoS) attacks. Please also take this opportunity to defeat denial-of-service attacks by implementing Ingress and Egress filtering through BCP38.

ntp-4.2.8p10 was released on 21 March 2017. It addresses 6 medium- and 5 low-severity security issues, 4 informational security topics, 15 bugfixes, and contains other improvements over 4.2.8p9.

Please see the NTP Security Notice for vulnerability and mitigation details.
Are you using Autokey in production? If so, please contact Harlan - he's got some questions for you.

Stratum One Time Servers

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Click the ISO Country Code to view complete details about a server. See InactiveTimeServers for previously listed servers that are no longer in service.

ISO: Location: Host / Sponsor: Service Area: Access Policy: Notify? LastModified:
AM AMNIC DC, Yerevan, Armenia Internet Society of Armenia, AM NIC worldwide OpenAccess No 2015-01-29T23:31:16Z
AM AMNIC DC, Yerevan, Armenia Internet Society of Armenia, AM NIC worldwide OpenAccess No 2014-10-08T07:56:13Z
AM AMNIC DC, Yerevan, Armenia   worldwide OpenAccess No 2013-04-01T21:48:39Z
AR Buenos Aires, Argentina Xfree.com.ar Argentina OpenAccess Yes 2017-06-03T07:03:18Z
AT Vienna   aco.net, VIX customers, Austrian Internet users OpenAccess No 2009-07-17T11:01:08Z
AT Hallein   Austria/Europe OpenAccess No 2016-08-29T13:41:21Z
AT InterXion, 1210 Vienna   aco.net, VIX customers, Austrian Internet users OpenAccess No 2013-02-20T16:27:37Z
AU Brisbane   Australia ClosedAccess Yes 2012-09-27T03:21:36Z
AU Melbourne   Australia ClosedAccess Yes 2013-04-11T22:44:12Z
AU Melbourne, Victoria   Australia OpenAccess No 2017-06-22T04:10:52Z
AU Sydney   Australia ClosedAccess Yes 2012-09-27T03:22:38Z
AU Katherine, Australia   Worldwide OpenAccess No 2013-06-12T02:34:24Z
AU Perth   Australia ClosedAccess Yes 2012-09-27T03:20:41Z
BE Royal Observatory of Belgium   all areas OpenAccess No 2006-03-16T11:06:27Z
BE Royal Observatory of Belgium   all areas OpenAccess No 2006-03-16T11:08:00Z
BG Svilengrad,Bulgaria rootshells Worldwide OpenAccess No 2017-06-11T06:07:02Z
BG Sofia, Bulgaria   Bulgaria, Europe OpenAccess No 2015-10-03T08:40:36Z
BR São Carlos, SP - IFSC USP   Worldwide OpenAccess Yes 2017-06-27T11:36:17Z
BR São Paulo, Brazil   Brazil OpenAccess No 2013-02-18T20:08:57Z
BR Brazil   Brazil OpenAccess No 2013-02-18T20:48:40Z
BR Rio de Janeiro, Brazil   Brazil OpenAccess No 2013-02-18T20:49:18Z
BR Laboratory for the Processing of Analog and Digital Signals (PADS), Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil   Brazil, Latin America and Caribbean OpenAccess No 2012-07-22T03:32:50Z
BR Rio de Janeiro, Brazil   Brazil OpenAccess No 2013-02-18T20:48:58Z
BR Brasília, Brasil   Brazil OpenAccess No 2011-03-11T18:29:38Z
CA University oc Saskatchewan, Saskatoon, Saskatchewan, SK, Canada   SASK#net, CA*net, Canada OpenAccess Yes 2017-06-08T14:36:55Z
CA Toronto, Ontario, Canada Toronto Internet Exchange Universe OpenAccess Yes 2015-09-15T01:27:23Z
CA Vancouver, British Columbia, Canada   Western Canada, northwest USA RestrictedAccess Yes 2007-02-14T13:48:03Z
CA University of Regina, Regina, Saskatchewan, Canada   SASK#net, CA*net, Canada RestrictedAccess Yes 2004-09-25T02:40:20Z
CA Toronto, Ontario, Canada Toronto Internet Exchange Canada OpenAccess No 2015-09-15T01:25:07Z
CA Toronto, Ontario, Canada Toronto Internet Exchange Earth OpenAccess No 2015-09-15T01:26:03Z
CA University of Saskatchewan, Saskatoon, Saskatchewan, SK, Canada   SASK#net, CA*net, Canada OpenAccess Yes 2017-06-07T19:15:27Z
CH Zug, Switzerland   Europe OpenAccess Yes 2012-06-18T16:07:02Z
CH Bülach/Zürich Freestone Systems Europe OpenAccess Yes 2013-12-26T20:34:04Z
CH Zug, Switzerland   Europe OpenAccess Yes 2012-06-18T16:02:43Z
CL Servicio Hidrografico y Oceanografico de la Armada de Chile   Chile OpenAccess Yes 2004-09-25T02:54:33Z
CN TIAN_LAB,Beijing,China www.openxid.com China Internet Users OpenAccess Yes 2014-09-04T07:35:20Z
CN Qingdao, China   Asia, China, anywhere OpenAccess Yes 2017-06-13T09:52:10Z
CN Northeastern University, Shenyang, Liaoning, China NEU China OpenAccess Yes 2013-08-08T02:08:59Z
CN Nanjing,Jiangsu,China   China Internet Users OpenAccess No 2011-03-15T11:55:47Z
CR Laboratorio Metrológico de Varialbles Eléctricas, SJO Costa Rica ICE Worldwide OpenAccess Yes 2017-05-29T17:55:50Z
CZ [[http://www.cesnet.cz/english][CESNET]Prague, The Czech Republic   Czech Republic and Slovakia, European academic community RestrictedAccess Yes 2004-09-25T02:56:29Z
CZ CZ.NIC, z.s.p.o., Americka 23, Prague CZ.NIC, z.s.p.o. Czech Republic OpenAccess No 2014-09-18T15:36:49Z
CZ UFE Prague, The Czech Republic     OpenAccess Yes 2013-01-18T16:18:48Z
DE Hannover, Niedersachsen, Germany BCS2005.net Germany OpenAccess No 2016-11-17T06:17:13Z
DE Technische Universitaet Berlin, D-10587 Berlin, FRG   Germany/Europe OpenAccess No 2016-02-10T07:09:46Z
DE Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany   Germany/Europe, others by arrangement OpenAccess Yes 2007-01-11T18:31:27Z
DE University Erlangen-Nuernberg, D-91058 Erlangen, FRG   Germany/Europe OpenAccess No 2004-12-14T15:01:17Z
DE Frankfurt, Germany Hoberg EU OpenAccess No 2016-12-12T08:28:37Z
DE Freie Universität Berlin, Zentraleinrichtung für Datenverarbeitung (ZEDAT), Germany   Germany/Europe OpenAccess No 2013-06-12T19:28:15Z
DE DL8OBH, Ilsede nr. Hanover time.dk0mav.as64643.de.ampr.org HAMNet / Europe OpenAccess Yes 2015-01-23T13:12:23Z
DE Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany   Germany/Europe, others by arrangement OpenAccess Yes 2007-01-11T18:32:55Z
DE University Erlangen-Nuernberg, D-91058 Erlangen, FRG   Germany/Europe OpenAccess No 2004-12-14T15:01:38Z
DE Computer Center University of Stuttgart, D-70550 Stuttgart, Germany   Germany/Europe OpenAccess Yes 2004-09-25T14:20:32Z
DE Munich/Germany   Germany/Europe OpenAccess No 2015-11-12T05:59:46Z
DE Mainz, Germany   Networks BGP-announced on the rlp-Netz and the X-WiN RestrictedAccess No 2012-11-30T09:15:29Z
DE Technische Universitaet Berlin, D-10587 Berlin, FRG   Germany/Europe OpenAccess No 2016-02-10T07:05:35Z
DE University Erlangen-Nuernberg, D-91058 Erlangen, FRG   Germany/Europe OpenAccess No 2004-12-14T15:00:25Z
DE Passau   1 ClosedAccess Yes 2017-06-03T17:41:59Z
DE University Erlangen-Nuernberg, D-91058 Erlangen, FRG   Germany/Europe OpenAccess No 2004-12-14T15:00:50Z
DE Freie Universität Berlin, Zentraleinrichtung für Datenverarbeitung (ZEDAT), Germany   Germany/Europe OpenAccess No 2013-06-12T19:30:14Z
DK Kokkedal, Denmark Algon IVS Denmark / Europe OpenAccess Yes 2017-05-03T21:33:46Z
DK Knabstrup, VestSjaelland , Denmark Private Individual Denmark / Europe OpenAccess Yes 2017-01-10T14:58:25Z
DK Lyngby, Denmark   Networks BGP-announced on the DIX RestrictedAccess No 2004-09-25T14:25:19Z
DK Sonnerup, Denmark   Denmark/Europe RestrictedAccess Yes 2016-11-13T16:18:17Z
DK Copenhagen N, Denmark (IPv6 access via Amsterdam)   Europe OpenAccess Yes 2012-10-16T12:48:46Z
DK Copenhagen N, Denmark   Europe OpenAccess Yes 2012-10-16T12:48:21Z
EE Tallinn, Estonia   worldwide OpenAccess Yes 2013-07-26T21:14:26Z
EE Tallinn, Estonia   worldwide OpenAccess Yes 2013-07-26T21:14:42Z
ES San Fernando, Cadiz, España Real Instituto y Observatorio de la Armada Worldwide OpenAccess Yes 2016-02-02T07:44:58Z
ES Laboratory of I2T Research Group, Faculty of Engineering, University of the Basque Country UPV/EHU, Bilbao, Basque Country, Spain. I2T Research Group Internet OpenAccess No 2015-06-12T14:26:53Z
ES San Fernando, Cadiz, España Real Instituto y Observatorio de la Armada Worldwide OpenAccess Yes 2016-02-02T07:45:28Z
FR SYRTE, Observatoire de Paris, Paris, France   France/Europe ClosedAccess Yes 2016-01-28T16:15:57Z
FR NIT, Trappes, Ile de France, France Néel Institute of Technology France, Europe OpenAccess Yes 2016-04-15T15:07:40Z
FR INRIA, Sophia Antipolis (French Riviera, near Nice), France   RENATER, R3T2, France/Europe RestrictedAccess No 2016-05-14T08:50:19Z
FR University of Rennes 1, Britany, France   France/Europe RestrictedAccess Yes 2004-09-25T14:28:23Z
GR Athens, Greece   Worldwide OpenAccess No 2011-03-03T08:34:55Z
HK Hong Kong   Hong Kong OpenAccess No 2015-09-01T03:57:19Z
HK       OpenAccess Yes 2005-02-06T00:07:00Z
HU Debrecen, Hungary Institute for Nuclear Research, Hungarian Academy of Sciences Europe OpenAccess No 2016-04-07T10:27:15Z
ID Jakarta   Indonesia RestrictedAccess Yes 2017-06-03T21:27:39Z
ID Jakarta PT. Axarva Media Teknologi Jakarta, Indonesia RestrictedAccess Yes 2017-06-03T21:26:56Z
IE Dublin Doran, Hahn & Co. As network paths make it sensible to use RestrictedAccess Yes 2016-08-25T08:27:27Z
IE Dept. of Information Technology, National University of Ireland, Galway, Ireland   Ireland, UK OpenAccess Yes 2004-09-25T14:41:50Z
IE Rosslare Strand     OpenAccess Yes 2012-12-26T11:17:47Z
IQ Iraq - Baghdad   Iraq OpenAccess Yes 2013-04-12T10:37:40Z
IS Iceland   Iceland RestrictedAccess No 2012-11-09T10:45:51Z
IT I.N.RI.M. - Torino, Italy   Italy/Europe OpenAccess Yes 2007-01-24T15:27:43Z
IT INRI.M.-Torino,Italia   Italia/Europa OpenAccess Yes 2014-01-30T14:35:12Z
IT I.N.RI.M. - Torino, Italy   Italy/Europe OpenAccess Yes 2007-01-24T15:00:30Z
IT INRI.M.-Torino, Italia   Italia / Europa OpenAccess Yes 2014-01-30T14:45:59Z
JP National Institute of Information and Communications Technology (Tokyo, JAPAN)   Japan and Asia OpenAccess No 2007-03-27T04:30:14Z
JP Fukuoka university, Fukuoka, Japan   Japan/Pacific area OpenAccess No 2004-09-25T14:52:00Z
JP Fukuoka university, Fukuoka, Japan   Japan/Pacific area OpenAccess No 2004-09-25T14:50:00Z
KZ Semey, Kazakhstan KazNIC Organization Kazakhstan OpenAccess Yes 2014-11-26T04:55:59Z
KZ Semey/VKO KazNIC Organization Worldwide OpenAccess Yes 2014-11-26T05:19:32Z
LT Vilnius laukas.lt Lithuania/Europe OpenAccess Yes 2015-12-20T11:47:43Z
MD Chisinau, Republic of Moldova trabia network Global OpenAccess No 2014-10-31T12:33:40Z
MX Laboratorio de Ciencias Físicas. Estado de México, México Laboratorio de Ciencias Físicas. (LCF México) Continente Americano/American Continent OpenAccess No 2013-08-30T21:01:41Z
MX Centro Nacional de Metrologia, Queretaro, Mexico   All Mexico and USA OpenAccess No 2004-09-25T14:53:18Z
MX Comisión de Planeación Universitaria, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, México Universidad Michoacana de San Nicolás de Hidalgo Mexico, North America, Latin America and Caribbean OpenAccess Yes 2015-12-17T15:40:08Z
MX Mexico City   Worldwide OpenAccess Yes 2017-02-08T14:42:42Z
MX Promomedios' corporate headquarters in Guadalajara, Jalisco, Mexico.   Mexico via UniNet network and worldwide OpenAccess No 2008-10-06T17:38:27Z
NL Donkerbroek, Netherlands Linoplan Europe OpenAccess No 2017-01-29T12:15:29Z
NL Verizon, Rotterdam, The Netherlands   The Netherlands/Europe OpenAccess No 2017-06-26T13:21:57Z
NL Hilversum, Netherlands   worldwide OpenAccess Yes 2015-05-28T21:34:15Z
NL Verizon, Amsterdam, The Netherlands   The Netherlands/Europe OpenAccess No 2017-06-26T13:23:11Z
NL Hilversum, The Netherlands   worldwide OpenAccess Yes 2015-05-28T21:31:31Z
NL Amsterdam, Netherlands NLNOG RING worldwide OpenAccess No 2014-03-01T16:35:03Z
NL Noordiwjk, the Netherlands European Space Agency Central Europe OpenAccess Yes 2016-12-13T06:32:09Z
NL Nijmegen, Gelderland, The Netherlands   Europe OpenAccess No 2016-06-10T07:41:52Z
NO The EDB Centre, University of Tromsoe, Norway   NORDUnet RestrictedAccess Yes 2004-09-25T15:04:14Z
NO IT-Dept., University of Tromso, Norway   NORDUnet ClosedAccess Yes 2007-03-02T09:47:49Z
NZ Christchurch, New Zealand NZRS Ltd New Zealand and Pacific Islands RestrictedAccess No 2017-06-09T02:59:20Z
NZ Wellington, New Zealand   New Zealand OpenAccess No 2015-10-06T23:52:32Z
NZ Wellington, New Zealand NZRS Ltd New Zealand and Pacific Islands RestrictedAccess No 2017-06-09T02:55:31Z
NZ Auckland, New Zealand NZRS Ltd New Zealand and Pacific Islands RestrictedAccess No 2017-06-09T02:59:30Z
NZ Auckland, New Zealand NZRS Ltd New Zealand and Pacific Islands RestrictedAccess No 2017-06-09T02:48:49Z
PL Warsaw, Poland   Public OpenAccess No 2009-02-03T20:28:25Z
PL Unizeto Technologies S.A., ul. Krolowej Korony Polskiej 21, 70-486 Szczecin, Polska   Internet OpenAccess No 2009-04-28T10:20:46Z
PL Warsaw, Poland   Public OpenAccess No 2010-02-27T15:48:03Z
PL Torun, Poland KL FAMO, Institute of Physics, UMK Poland/Europe OpenAccess No 2015-03-31T08:52:58Z
RO EMCLab.ro - Electromagnetic Compatibility Laboratory, Suceava, 720229, Romania Stefan cel Mare University of Suceava Worldwide OpenAccess Yes 2016-10-08T12:08:38Z
RO EMCLab.ro - Electromagnetic Compatibility Laboratory, Suceava, 720229, Romania Stefan cel Mare University of Suceava Worldwide OpenAccess Yes 2016-10-08T12:09:10Z
RO EMCLab.ro - Electromagnetic Compatibility Laboratory, Suceava, 720229, Romania Stefan cel Mare University of Suceava Worldwide OpenAccess Yes 2016-10-08T12:09:36Z
RO Suceava, 720236, Romania   Romania/Europe RestrictedAccess Yes 2008-06-25T19:58:15Z
RU Novosibirsk, Russia   Russia OpenAccess Yes 2016-10-15T06:34:28Z
RU Saratov Information Networks Ltd. All areas OpenAccess Yes 2016-01-03T05:32:31Z
RU VNIIFTRI, Moscow region, Russia   All areas OpenAccess Yes 2013-04-15T09:59:29Z
RU Moscow MSK-IX Any, anycast cluster used OpenAccess No 2014-05-07T09:07:48Z
RU Branch office VNIIFTRi, Irkutsk region, Russia     OpenAccess Yes 2012-11-01T02:01:18Z
RU VNIIFTRI, Moscow region, Russia   All areas OpenAccess Yes 2013-04-15T10:00:14Z
RU Saratov Information Networks Ltd. All areas OpenAccess Yes 2014-05-30T01:49:42Z
RU Saratov Information Networks Ltd. All areas OpenAccess Yes 2016-01-03T05:33:08Z
RU SNIIM, Novosibirsk, Russia   All areas OpenAccess No 2016-03-04T10:24:21Z
RU Saint-Petersburg Mobatime Systems Worldwide OpenAccess No 2015-03-18T21:35:18Z
RU Russia, Moscow ojab Worldwide OpenAccess No 2014-08-04T17:14:04Z
RU Novosibirsk MSK-IX (NSK-IX) Any, anycast cluster used OpenAccess No 2014-05-07T09:05:46Z
RU Novosibirsk, Russia   Russia ClosedAccess Yes 2014-01-14T04:47:25Z
RU St.Petersburg MSK-IX (SPB-IX) Any, anycast cluster used OpenAccess No 2014-05-07T09:07:21Z
RU VNIIFTRI, Moscow region, Russia   All areas OpenAccess Yes 2013-04-15T10:00:36Z
RU Izhevsk, Russia   Worldwide OpenAccess No 2013-05-09T07:20:02Z
RU Moscow, Russia US Embassy Moscow, Russia Worldwide OpenAccess No 2017-06-06T11:29:05Z
RU Khabarovsk, Russia   Europe OpenAccess No 2013-02-06T01:43:57Z
RU Moscow, Russia US Embassy Moscow, Russia Worldwide OpenAccess No 2017-06-06T11:27:37Z
RU Vladivostok, Russia   Russia, Far East ClosedAccess Yes 2006-06-19T03:33:45Z
RU Khabarovsk, Russia   Europe OpenAccess No 2013-02-06T01:47:24Z
RU VNIIFTRI, Moscow region, Russia   All areas OpenAccess Yes 2013-04-15T10:01:01Z
RU Branch office VNIIFTRI, Irkutsk region, Russia     OpenAccess Yes 2012-11-01T01:59:15Z
RU Saratov Information Networks Ltd. All areas OpenAccess Yes 2014-05-30T01:50:14Z
SA Saudi Arabia, Riyadh, KACST/ISU   Worldwide OpenAccess Yes 2017-05-17T06:59:26Z
SA Saudi Arabia, Riyadh, KACST/ISU   Worldwide OpenAccess Yes 2017-05-17T07:00:09Z
SE Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Stockholm, Sweden)   all areas OpenAccess No 2009-09-17T13:11:48Z
SE SP Swedish National Testing and Research Institute, BORAS, SWEDEN   all areas OpenAccess No 2004-09-27T01:54:31Z
SE Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Stockholm, Sweden)   all areas OpenAccess No 2009-09-17T13:13:32Z
SE Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Gothenburg, Sweden)   all areas OpenAccess No 2009-09-17T13:12:45Z
SE SP Swedish National Testing and Research Institute, BORAS, SWEDEN   all areas OpenAccess No 2004-09-27T01:52:20Z
SE SP Technical Research Institute of Sweden, Stockholm Sweden   worldwide OpenAccess No 2013-06-27T12:37:26Z
SE Stupi AB, Stockholm, SWEDEN   SUnet, NORDUnet OpenAccess No 2012-12-10T17:35:48Z
SE Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Malmoe, Sweden)   all areas OpenAccess No 2009-09-17T13:13:11Z
SE SP Technical Research Institute of Sweden, Borås Sweden     OpenAccess No 2013-01-15T09:27:48Z
SE SP Technical Research Institute of Sweden, Borås Sweden     OpenAccess No 2013-01-15T09:44:50Z
SE SP Technical Research Institute of Sweden, Stockholm Sweden     OpenAccess No 2013-01-15T09:41:21Z
SE Stupi AB, Stockholm, SWEDEN   Europe OpenAccess No 2012-12-10T17:36:14Z
SE Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Malmoe, Sweden)   all areas OpenAccess No 2009-09-17T13:11:35Z
SE Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Gothenburg, Sweden)   all areas OpenAccess No 2009-09-17T14:00:23Z
SG SingNet, Singapore   STIX/Asia (outside Singapore), others by arrangement RestrictedAccess Yes 2004-09-27T02:08:00Z
SG SG DCS1 Worldwide OpenAccess Yes 2013-08-18T05:07:40Z
SG Singapore znx Singapore and Asia OpenAccess Yes 2017-01-02T06:18:08Z
SI "J. Stefan" Institute, Ljubljana, Slovenia   Slovenia, European academic community, others by arrangement RestrictedAccess Yes 2005-03-04T01:13:03Z
SI MMC Mostovna, Nova Gorica, Slovenija   Slovenia, Ex-Yugoslavia academic community, others by arrangement OpenAccess Yes 2006-07-22T17:58:28Z
TR Turkey   Wordwide OpenAccess Yes 2014-02-07T14:30:01Z
TW Taiwan National Time and Frequency Standard Laboratory Taiwan OpenAccess No 2014-02-26T20:20:54Z
UA Odessa, Ukraine   Central and Easten Europe OpenAccess Yes 2015-09-14T12:00:14Z
UA ISP ColoCall, DC Bunker, Kiev, Ukraine   Central and Easten Europe OpenAccess Yes 2011-08-26T10:37:27Z
UA Kyiv, Ukraine SELF Worldwide OpenAccess Yes 2016-07-16T16:07:13Z
UA Odessa, Ukraine   Ukraine OpenAccess No 2016-03-17T11:22:17Z
UA Odessa, Ukraine   Central and Easten Europe OpenAccess Yes 2016-03-14T13:49:18Z
UA ISP ColoCall, Kiev, Ukraine   Central and Easten Europe OpenAccess Yes 2011-08-27T20:08:11Z
UK Milton Keynes, UK Leo Bodnar Electronics Worldwide OpenAccess Yes 2017-01-06T23:42:24Z
UK Milton Keynes, UK Leo Bodnar Electronics Worldwide OpenAccess Yes 2017-01-06T23:41:40Z
UK Computing Systems Research Ltd. United Kingdom   United Kingdom Western Europe OpenAccess No 2011-05-09T16:10:37Z
UK Merseyside   UK OpenAccess Yes 2015-12-19T20:53:48Z
UK Milton Keynes, UK Leo Bodnar Electronics Worldwide OpenAccess No 2017-01-28T11:47:17Z
UK Milton Keynes, UK Leo Bodnar Electronics Worldwide OpenAccess Yes 2017-01-06T23:40:15Z
UK Leatherhead, Surrey, England, UK   World Wide RestrictedAccess Yes 2016-10-08T10:10:01Z
UK University of London Computer Centre, UK   JANET ClosedAccess Yes 2004-09-27T02:17:55Z
UK Milton Keynes, UK Leo Bodnar Electronics Worldwide OpenAccess No 2017-01-28T11:45:46Z
US AK University of Alaska, Fairbanks, AK   Pacific Northwest, others by arrangement RestrictedAccess Yes 2014-03-13T18:56:12Z
US CA Layer42, Santa Clara, CA   Western US OpenAccess No 2006-12-12T02:38:04Z
US CA USC Information Sciences Institute, Marina del Rey, CA   CalRen2, Los Nettos region OpenAccess No 2004-09-27T02:39:22Z
US CA Los Angeles, CA   US OpenAccess No 2012-03-02T22:38:27Z
US CA Deep Space Imaging, Valencia, CA   Worldwide OpenAccess No 2010-12-22T19:12:42Z
US CA San Diego, CA, US   any OpenAccess No 2015-02-10T10:19:52Z
US CA California Institute of Technology, Pasadena, CA   USA Pacific timezone, others by arrangement RestrictedAccess Yes 2014-03-13T04:29:07Z
US CA Rohnert Park, CA   Within 100ms of server OpenAccess No 2017-06-27T04:55:47Z
US CA 55 South Market Street, San Jose, CA 95113 Silicon Valley Web Hosting LLC worldwide OpenAccess No 2017-02-10T21:44:59Z
US CA Mar Vista, California, USA, Earth ZiaSpace Southern California, Nevada, Arizona OpenAccess Yes 2014-03-25T21:19:43Z
US CA Hewlett-Packard Corp., Palo Alto, CA   USA Pacific and Mountain timezones, others by arrangement. RestrictedAccess Yes 2014-10-16T18:12:46Z
US CA University of Colorado, Boulder, Colorado   US OpenAccess Yes 2008-03-05T20:26:01Z
US CA Internet Software Consortium, Palo Alto, CA   BARRnet, Alternet-west, CIX-west OpenAccess No 2005-03-24T23:12:51Z
US CA Deep Space Imaging, Valencia, CA   Worldwide OpenAccess No 2010-12-22T19:14:36Z
US CA Hurricane Electric, Fremont, California   all areas OpenAccess No 2005-04-06T14:02:40Z
US CA Hurricane Electric, San Jose, California   all areas OpenAccess No 2005-04-06T14:02:02Z
US CA HP Western Research Laboratory, Palo Alto, CA   NSFNET, BARR region OpenAccess No 2004-09-27T02:21:15Z
US CA UCLA, Los Angeles, CA   Pacific time zone, others on request RestrictedAccess Yes 2014-03-13T19:03:34Z
US CO NIST Boulder Laboratories, Boulder, Colorado   NSFnet, WESTnet OpenAccess No 2005-08-19T20:41:29Z
US CO JILA Laboratory, University of Colorado   Western US OpenAccess No 2005-08-19T20:29:00Z
US CO NIST Boulder Laboratories, Boulder, Colorado   NSFnet, WESTnet OpenAccess No 2005-08-19T20:37:25Z
US CO Schriever, Colorado   USA Pacific and Mountain time zones, others by arrangement. RestrictedAccess No 2015-10-23T16:46:16Z
US CO Boulder, CO Rainy Enterprises Mountain Time Zone OpenAccess No 2017-02-08T08:39:11Z
US CO NIST Boulder Laboratories, Boulder, Colorado   NSFnet, WESTnet OpenAccess No 2005-08-19T20:41:00Z
US CO NIST Laboratory, Boulder, Colorado   Open RestrictedAccess Yes 2008-03-01T21:54:23Z
US CO Schriever, Colorado   US Pacific, Mountain time zones, others by arrangement RestrictedAccess Yes 2015-06-01T17:09:54Z
US DC U.S. Naval Observatory, Washington, DC   Eastern Time Zone RestrictedAccess No 2015-10-13T16:17:00Z
US DC U.S. Naval Observatory, Washington, DC   Eastern Time Zone RestrictedAccess No 2015-10-13T16:17:00Z
US DC U.S. Naval Observatory, Washington, DC   Eastern Time Zone RestrictedAccess No 2015-10-13T16:17:01Z
US DE ECE Department, University of Delaware, Newark, DE 19716   interplanetary RestrictedAccess No 2013-05-31T23:56:53Z
US DE University of Delaware, Newark, DE   BBN Planet SER ClosedAccess Yes 2004-09-27T03:11:00Z
US DE PEPCO Holdings Inc., 500 N Wakefield Dr., Newark DE   AT&T and QWEST OpenAccess No 2009-03-27T16:23:28Z
US FL CSN Central Florida   Florida and Global OpenAccess Yes 2013-09-22T06:09:34Z
US FL University of Florida, Gainesville, FL   Eastern time zone US RestrictedAccess No 2015-10-23T16:45:13Z
US GA Georgia Institute of Technology, Atlanta, GA   USA Eastern timezone, others by arrangement RestrictedAccess No 2015-10-23T16:45:43Z
US HI Maui High Performance Computing Center   Hawaii, others on request RestrictedAccess Yes 2014-03-14T14:09:30Z
US IA Monticello, Iowa USSHC Planetary OpenAccess No 2014-07-30T21:15:43Z
US IA United States Secure Hosting and Colocation, Monticello Iowa   Planetary OpenAccess No 2014-07-30T21:22:30Z
US IA Griswold, IA   Griswold Community Schools, Griswold, IA OpenAccess Yes 2017-05-29T19:30:21Z
US IL University of Illinois, Urbana-Champaign, IL   CICNET, Midwest, NCSA region ClosedAccess Yes 2017-06-21T13:35:44Z
US IL Galesburg, IL Jet Air, Inc. North America OpenAccess No 2017-05-11T19:35:55Z
US IL Chicago, IL   North America OpenAccess No 2007-12-05T13:40:06Z
US IN CERIAS, Purdue University, West Lafayette, IN   Internet2, CIC and midwest US RestrictedAccess Yes 2017-06-07T16:01:05Z
US IN CERIAS, Purdue University, West Lafayette, IN   North America RestrictedAccess Yes 2017-06-03T19:06:25Z
US MA Massachusetts Institute of Technology, Cambridge, MA   Eastern US OpenAccess Yes 2004-09-27T03:31:46Z
US MA Marblehead, MA Alexander Falk Eastern US OpenAccess No 2016-11-12T15:25:03Z
US MA Cambridge, MA   Eastern US OpenAccess No 2004-09-27T03:38:00Z
US MD NIST Central Computer Facility, Gaithersburg, Maryland   NSFnet, SURAnet OpenAccess No 2005-08-19T21:35:18Z
US MD NIST Central Computer Facility, Gaithersburg, Maryland   NSFnet, SURAnet OpenAccess No 2005-08-19T21:33:51Z
US ME Colby College, Waterville, ME   Northeastern US and Canada, others by arrangement RestrictedAccess No 2015-10-23T16:45:24Z
US MI Clear Voice 1 in Westland, Michigan Clear Voice One Michigan, Ohio, Indiana, Illinois, Wisconsin, Canada, OpenAccess Yes 2016-03-26T19:51:59Z
US MI Southfield, Michigan   Open OpenAccess Yes 2007-11-21T21:04:28Z
US MN Bemidji, MN Bemidji NTP Project Worldwide OpenAccess No 2017-06-25T05:57:03Z
US MO Washington University, St. Louis, MO   USA Central timezone, others by arrangement. RestrictedAccess No 2015-10-23T16:45:56Z
US MO University of Missouri-Columbia, Columbia, MO, USA   MOREnet RestrictedAccess Yes 2017-06-05T13:53:06Z
US NC Chapel Hill, NC, USA UNC Chapel Hill Department of Computer Science Southeastern United States and Caribbean OpenAccess Yes 2017-02-10T21:44:47Z
US NC Chapel Hill, NC, USA UNC Chapel Hill Department of Computer Science Southeastern United States and Caribbean OpenAccess Yes 2017-02-10T21:44:08Z
US NC Chapel Hill, NC, USA UNC Chapel Hill Department of Computer Science Southeastern United States and Caribbean OpenAccess Yes 2017-02-10T21:44:21Z
US NC Chapel Hill, NC, USA UNC Chapel Hill Department of Computer Science Southeastern United States and Caribbean OpenAccess Yes 2017-02-10T21:44:35Z
US NJ Jensen Research Corporation, Ramsey NJ   Eastern US RestrictedAccess Yes 2011-12-02T03:15:30Z
US NJ Lumberton NJ   South Jersey OpenAccess Yes 2017-02-10T21:43:32Z
US NJ Maplewood, NJ   Global OpenAccess No 2017-06-05T01:58:54Z
US NY Hurricane Electric, New York City, New York   all areas OpenAccess No 2005-04-06T14:03:22Z
US NY Morningside Campus, Columbia University, New York, NY   NYSERnet RestrictedAccess No 2015-10-13T20:47:21Z
US NY Syracuse, NY   NE United States OpenAccess Yes 2016-06-03T14:10:21Z
US OH Ohio State University, Columbus, Ohio OARNet Central Time Zone, others by arrangement RestrictedAccess No 2015-10-23T16:45:32Z
US OH Clear Voice One in Troy, Ohio Clear Voice One Ohio, Kentucky, Indiana, Michigan, Pennsylvania OpenAccess Yes 2015-05-21T10:14:08Z
US OK Oklahoma State University, Stillwater, OK   Central Time Zone, others by arrangement RestrictedAccess No 2017-06-03T19:22:02Z
US PA Penn State University, University Park, PA   Internet, Internet2, 3ROX ClosedAccess Yes 2017-06-03T19:23:29Z
US TX Lubbock, TX Quintex Alliance Consulting US Central OpenAccess No 2017-06-03T00:46:06Z
US TX University of Houston, Houston, TX   US Central time zone, others on request RestrictedAccess No 2015-10-23T16:46:03Z
US UT XMission Internet, Salt Lake City, Utah   Western US OpenAccess No 2012-11-25T00:07:37Z
US UT Syracuse Utah NG7M Funded NTP Stratum 1 Servers Utah / Western US OpenAccess No 2016-12-07T07:24:02Z
US WI Netwrx Consulting   Global OpenAccess Yes 2017-01-04T02:56:25Z
US WI Netwrx Consulting   Global OpenAccess Yes 2017-01-04T02:51:23Z
US WI Computer Science Department, University of Wisconsin-Madison   US/any RestrictedAccess Yes 2017-06-05T22:26:21Z

Related topics: RulesOfEngagement, StratumTwoTimeServers, ManagingYourListEntries, SubmittingYourListEntriesViaEmail

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