NTP users are strongly urged to take immediate action to ensure that their NTP daemon is not susceptible to use in a reflected denial-of-service (DRDoS) attack. Please see the NTP Security Notice for vulnerability and mitigation details, and the Network Time Foundation Blog for more information. (January 2014)

Stratum One Time Servers

Please read the Rules Of Engagement before using these lists. These lists are updated frequently and should not be cached.

Read ManagingYourListEntries and then

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		worldwide	OpenAccess	No	2011-11-17T18:31:24Z
AM	AMNIC DC, Yerevan, Armenia		worldwide	OpenAccess	No	2013-04-01T21:48:39Z
AM	Yerevan,Armenia		Europe,Armenia	OpenAccess	No	2013-02-20T16:26:58Z
AR	Buenos Aires, Argentina	Xfree.com.ar	Argentina	OpenAccess	Yes	2013-03-02T07:26:30Z
AT	Vienna		aco.net, VIX customers, Austrian Internet users	OpenAccess	No	2009-07-17T11:01:08Z
AT	Wiener Neustadt, Austria		Austria/Europe	OpenAccess	Yes	2010-11-05T14:29:35Z
AT	Hallein		jh1.at	OpenAccess	No	2013-02-18T20:26:23Z
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	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	rootshells	Bulgaria/Europe	OpenAccess	Yes	2014-03-26T07:04:16Z
BG	Sofia, Bulgaria			OpenAccess	No	2012-09-26T17:21:27Z
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	Brazilian Research Network/Rede Nacional de Pesquisa (RNP)		Brazil	RestrictedAccess	No	2004-09-25T02:33:58Z
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
BY	Belarus			OpenAccess	Yes	2011-09-06T13:56:55Z
CA	University oc Saskatchewan, Saskatoon, Saskatchewan, SK, Canada		SASK#net, CA*net, Canada	OpenAccess	Yes	2004-09-25T02:49:00Z
CA	Toronto, Ontario, Canada	Toronto Internet Exchange	Canada	OpenAccess	Yes	2014-03-27T14:24:21Z
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	2014-03-27T14:24:57Z
CA	Department of Computer Science, University of Calgary, Calgary, Alberta, Canada		North America	RestrictedAccess	Yes	2004-12-10T19:38:38Z
CA	University of Saskatchewan, Saskatoon, Saskatchewan, SK, Canada		SASK#net, CA*net, Canada	OpenAccess	Yes	2004-09-25T02:47:00Z
CA	Oakville, Ontario, Canada	Servman.ca	Eastern Canada and US	OpenAccess	Yes	2013-07-02T16:48:13Z
CH	St. Moritz			OpenAccess	Yes	2009-04-02T14:05:22Z
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
CL	Dpto. Geofísica, Universidad de Chile. Santiago, Chile.		REUNA and interconnected networks, Chile	OpenAccess	Yes	2004-09-25T02:53:20Z
CN	TIAN_LAB,Beijing,China	www.openxid.com	China Internet Users	OpenAccess	Yes	2013-08-04T00:24:53Z
CN	Qingdao, China	teramoby inc.	Asia, China, anywhere	OpenAccess	Yes	2014-01-01T15:37:42Z
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	2014-03-20T14:24:34Z
CR	Laboratorio Metrológico de Varialbles Eléctricas, SJO Costa Rica	ICE	Worldwide	OpenAccess	Yes	2014-03-20T14:25:23Z
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		Czech Republic	OpenAccess	Yes	2013-02-18T20:27:23Z
CZ	UFE Prague, The Czech Republic			OpenAccess	Yes	2013-01-18T16:18:48Z
DE	one4vision Gmbh, Saarbruecken, Saarland, Germany		Germany, Europe	OpenAccess	Yes	2004-01-06T13:10:00Z
DE	UHR.DE, Berlin, Germany		Germany	OpenAccess	Yes	2008-05-09T05:05:28Z
DE	Technische Universitaet Berlin, D-10587 Berlin, FRG		Germany/Europe	OpenAccess	No	2009-01-30T08:47:17Z
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	Duesseldorf, Germany	Paul Florian Hoberg, hoberg.ch	EU/DE/CH/AT/FR, PL, RU	OpenAccess	Yes	2014-05-09T06:35:03Z
DE	Freie Universität Berlin, Zentraleinrichtung für Datenverarbeitung (ZEDAT), Germany		Germany/Europe	OpenAccess	No	2013-06-12T19:28:15Z
DE	DL8OBH, Ilsede nr. Hanover		HAMNet / Europe	OpenAccess	Yes	2014-05-19T23:50:45Z
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	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	2012-08-06T15:14:53Z
DE	University Erlangen-Nuernberg, D-91058 Erlangen, FRG		Germany/Europe	OpenAccess	No	2004-12-14T15:00:25Z
DE	Passau		1	ClosedAccess	Yes	2014-07-04T14:21:13Z
DE	University Erlangen-Nuernberg, D-91058 Erlangen, FRG		Germany/Europe	OpenAccess	No	2004-12-14T15:00:50Z
DE	Frankfurt, Germany		Worldwide	OpenAccess	No	2005-10-27T19:52:20Z
DE	Freie Universität Berlin, Zentraleinrichtung für Datenverarbeitung (ZEDAT), Germany		Germany/Europe	OpenAccess	No	2013-06-12T19:30:14Z
DK	Varde, Denmark		Denmark	RestrictedAccess	Yes	2013-12-06T23:05:37Z
DK	Lyngby, Denmark		Networks BGP-announced on the DIX	RestrictedAccess	No	2004-09-25T14:25:19Z
DK	Sonnerup, Denmark		Denmark/Europe	RestrictedAccess	Yes	2011-02-26T19:03:44Z
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
DK	Slagelse, Denmark		As network paths make it sensible	RestrictedAccess	Yes	2004-09-25T14:22:57Z
EE	Tallinn, Estonia		worldwide	OpenAccess	Yes	2013-07-26T21:14:26Z
EE	Tallinn, Estonia		worldwide	OpenAccess	Yes	2013-07-26T21:14:42Z
ES	ROA, San Fernando, Cadiz, España			OpenAccess	Yes	2005-11-04T13:01:56Z
ES	Laboratory of I2T Research Group, Faculty of Engineering, University of the Basque Country, Bilbao, Basque Country, Spain.	I2T Research Group	Internet	OpenAccess	No	2014-03-04T11:35:15Z
FR	INRIA, Rocquencourt (near Paris), France		France/Europe	OpenAccess	Yes	2004-09-25T14:26:54Z
FR	SYRTE, Observatoire de Paris, Paris, France		France/Europe	RestrictedAccess	Yes	2009-12-21T16:50:30Z
FR	INRIA, Sophia Antipolis (French Riviera, near Nice), France		RENATER, R3T2, France/Europe	RestrictedAccess	No	2004-09-25T14:36:00Z
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	2013-02-18T20:40:37Z
HK				OpenAccess	Yes	2005-02-06T00:07:00Z
HK	The Chinese University of Hong Kong		Hong Kong, China and South East Asia	OpenAccess	No	2012-05-18T01:30:24Z
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
IN	india		india	OpenAccess	Yes	2014-01-27T06:30:36Z
IQ	Iraq - Baghdad		Iraq	OpenAccess	Yes	2013-04-12T10:37:40Z
IQ	Iraq - Baghdad			OpenAccess	Yes	2012-03-31T00:36:51Z
IQ	Iraq - Sulaimaniyah			OpenAccess	Yes	2012-03-30T14:25:53Z
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
KR	Republic of Korea			OpenAccess	No	2012-12-30T01:30:40Z
MA	Maroc / Morocco		Africa/Casablanca	OpenAccess	Yes	2014-04-07T10:31:22Z
MD	Europe, Moldova, Chisinau		Moldova	OpenAccess	No	2013-02-18T20:23:32Z
MD	Chisinau, Republic of Moldova	Trabia-Network	Global	OpenAccess	No	2013-04-21T10:02:17Z
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		Mexico, North America, Latin America and Caribbean	OpenAccess	Yes	2010-11-12T19:46:54Z
MX	Promomedios' corporate headquarters in Guadalajara, Jalisco, Mexico.		Mexico via UniNet network and worldwide	OpenAccess	No	2008-10-06T17:38:27Z
Ma	Maroc / Morocco		Africa/Casablanca	OpenAccess	Yes	2014-04-07T10:27:31Z
NL	Donkerbroek, Netherlands		Netherlands	OpenAccess	No	2010-08-29T06:06:04Z
NL	Huizen		Worldwide	OpenAccess	Yes	2011-02-17T13:33:07Z
NL	Verizon, Rotterdam, The Netherlands		The Netherlands/Europe	OpenAccess	No	2007-07-11T12:45:50Z
NL	Hilversum, Netherlands		worldwide	OpenAccess	Yes	2008-12-20T10:50:07Z
NL	Bergschenhoek	Helux	NL	OpenAccess	Yes	2013-08-25T11:08:35Z
NL	Verizon, Amsterdam, The Netherlands		The Netherlands/Europe	OpenAccess	No	2007-07-11T12:47:17Z
NL	Hilversum, The Netherlands		worldwide	OpenAccess	Yes	2012-01-12T04:30:35Z
NL	NLnet, Amsterdam, The Netherlands		The Netherlands/Europe	OpenAccess	No	2004-09-25T14:58:00Z
NL	Spijkenisse, The Netherlands	Polaire	Netherlands	OpenAccess	Yes	2013-07-02T09:09:18Z
NL	NLnet, Amsterdam, The Netherlands		he Netherlands/Europe	OpenAccess	No	2004-09-25T15:03:03Z
NL	Amsterdam, Netherlands	NLNOG RING	worldwide	OpenAccess	No	2014-03-01T16:35:03Z
NL	MCI, Amsterdam, The Netherlands		The Netherlands/Europe	OpenAccess	No	2005-12-20T10:38:18Z
NL	NLnet, Amsterdam, The Netherlands		The Netherlands/Europe	OpenAccess	No	2004-09-25T14:57:00Z
NL	Gouda, The Netherlands		NL	OpenAccess	Yes	2010-03-05T15:39:03Z
NL	Elst, Gelderland, The Netherlands		Worldwide	OpenAccess	No	2008-04-02T22:13:12Z
NO	Levanger, Norway		Worldwide	OpenAccess	Yes	2014-05-28T22:05:17Z
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	Wellington, New Zealand		New Zealand	OpenAccess	No	2013-03-07T23:35:06Z
NZ	New Zealand		New Zealand and Pacific Islands	RestrictedAccess	Yes	2010-09-08T09:02:27Z
PL	Polish Telecom, Warsaw, Poland		TPNET	OpenAccess	No	2013-04-15T08:23:41Z
PL	Warsaw, Poland		Public	OpenAccess	No	2009-02-03T20:28:25Z
PL	Polish Telecom, Warsaw, Poland		TPNET	OpenAccess	No	2013-04-15T08:25:05Z
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	Astrogeodynamical Observatory, Space Research Centre, Borowiec, Poland		Poland/Europe	OpenAccess	No	2004-09-27T12:25:39Z
PT	Arrifana, Santa Maria da Feira, Portugal		Portugal and Europe	RestrictedAccess	Yes	2011-12-08T15:28:09Z
PT	Arrifana, Santa Maria da Feira, Portugal		Portugal and Europe	RestrictedAccess	Yes	2011-12-08T15:26:32Z
RO	University of Suceava, Electrical Engineering and Computer Science Department, Suceava, 720229, Romania	Stefan cel Mare University of Suceava	Romania/Europe	OpenAccess	Yes	2013-12-27T20:03:10Z
RO	University of Suceava, Electrical Engineering and Computer Science Department, Suceava, 720229, Romania	Stefan cel Mare University of Suceava	Romania/Europe - open to Stratum 2 servers only by request	OpenAccess	Yes	2013-12-27T20:04:45Z
RO	University of Suceava, Electrical Engineering and Computer Science Department, Suceava, 720229, Romania	Stefan cel Mare University of Suceava	Romania/Europe	OpenAccess	Yes	2013-12-27T20:03:53Z
RO	Suceava, 720236, Romania		Romania/Europe	RestrictedAccess	Yes	2008-06-25T19:58:15Z
RU	Novosibirsk, Russia		Russia	OpenAccess	Yes	2013-02-23T05:47:32Z
RU	Saratov	Information Networks Ltd.	All areas	OpenAccess	Yes	2014-05-30T01:49:18Z
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	2014-05-30T01:49:56Z
RU	Russia, Moscow	ojab	Worldwide	OpenAccess	No	2014-07-18T17:44:54Z
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	BCCVS RAMS, Moscow, Russia		worldwide	OpenAccess	No	2012-12-27T16:16:27Z
RU	US Embassy Moscow, Russia	US Embassy Moscow, Russia	Russia	OpenAccess	No	2014-01-27T12:22:37Z
RU	Khabarovsk, Russia		Europe	OpenAccess	No	2013-02-06T01:43:57Z
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	2012-04-15T14:17:35Z
SA	Saudi Arabia, Riyadh, KACST/ISU		Worldwide	OpenAccess	Yes	2012-04-15T14:17:39Z
SE	Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Stockholm, Sweden)		all areas	OpenAccess	No	2009-09-17T13:11:48Z
SE	Lysator Academic Computer Society at Linköping University		all areas	OpenAccess	No	2013-02-18T20:42:59Z
SE	SP Swedish National Testing and Research Institute, BORAS, SWEDEN		all areas	OpenAccess	No	2004-09-27T01:54:31Z
SE	OpenBSD.se, Uppsala, Sweden. statistics		all areas	OpenAccess	No	2009-08-15T10:23:10Z
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	OpenBSD.se, Uppsala, Sweden. statistics		all areas	OpenAccess	No	2009-08-15T10:23:57Z
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	0x.sg	Singapore and Asia	OpenAccess	No	2013-09-10T22:03:38Z
SG	SPRING Singapore		Singapore and Asia	RestrictedAccess	Yes	2004-09-27T02:07:36Z
SI	"J. Stefan" Institute, Ljubljana, Slovenia		Slovenia, European academic community, others by arrangement	RestrictedAccess	Yes	2005-03-04T01:13:03Z
SI	Slovenia, Ljubljana		Slovenia and neighbouring countries	OpenAccess	No	2012-08-28T19:01:22Z
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	Kiev, Ukraine		Central and Easten Europe	OpenAccess	Yes	2013-02-18T20:33:08Z
UA	ISP ColoCall, DC Bunker, Kiev, Ukraine		Central and Easten Europe	OpenAccess	Yes	2011-08-26T10:37:27Z
UA	ISP ColoCall, Kiev, Ukraine		Central and Easten Europe	OpenAccess	Yes	2011-08-27T20:08:11Z
UK	Farningham, UK		UK/North West Europe	RestrictedAccess	Yes	2010-12-19T16:25:35Z
UK	Computing Systems Research Ltd. United Kingdom		United Kingdom Western Europe	OpenAccess	No	2011-05-09T16:10:37Z
UK	Dartford, UK			RestrictedAccess	No	2012-09-06T14:58:17Z
UK	Surrey, England, UK		Europe	RestrictedAccess	Yes	2014-02-11T14:56:31Z
UK	High Wycombe		UK / Europe	RestrictedAccess	Yes	2013-03-14T10:15:40Z
UK	University of London Computer Centre, UK		JANET	ClosedAccess	Yes	2004-09-27T02:17:55Z
US AK	University of Alaska, Fairbanks, AK		Pacific Northwest, others by arrangement	RestrictedAccess	Yes	2014-03-13T18:56:12Z
US AZ	Thunderbird School of Global Managment, Glendale, Arizona		Western US	RestrictedAccess	Yes	2008-06-23T18:13:21Z
US CA	Layer42, Santa Clara, CA		Western US	OpenAccess	No	2006-12-12T02:38:04Z
US CA	Sunnyvale, CA US		Western US	RestrictedAccess	No	2004-09-27T02:25:34Z
US CA	USC Information Sciences Institute, Marina del Rey, CA		CalRen2, Los Nettos region	OpenAccess	No	2004-09-27T02:39:22Z
US CA	GPSClock.com headquarters, Redondo Beach, CA		US Pacific, Los Angeles area	RestrictedAccess	No	2004-09-27T02:40:36Z
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	California Institute of Technology, Pasadena, CA		USA Pacific timezone, others by arrangement	RestrictedAccess	Yes	2014-03-13T04:29:07Z
US CA	Sausalito CA		Within 60ms RTT	OpenAccess	Yes	2005-02-25T19:22:00Z
US CA	AOL Time Warner facility, Sunnyvale, California		Western US	OpenAccess	No	2005-08-19T20:13:29Z
US CA	Mar Vista, California, USA, Earth	ZiaSpace	Southern California, Nevada, Arizona	OpenAccess	Yes	2014-03-25T21:19:43Z
US CA	Cupertino CA (SF Bay area)		West Coast USA	OpenAccess	No	2004-09-27T02:33:24Z
US CA	Hewlett-Packard Corp. , Palo Alto, CA		USA Pacific and Mountain timezones, others by arrangement.	RestrictedAccess	Yes	2014-03-13T04:19:43Z
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	NASA Ames Research Center, Moffett Field, CA		NSFNET, BARR region, NASA NSN, DOE ESNET, DDN	ClosedAccess	Yes	2004-09-27T02:34:39Z
US CA	Los Angeles, California			OpenAccess	No	2008-04-19T17:51:27Z
US CA	GPSClock.com headquarters, Redondo Beach, CA		US Pacific, Los Angeles area	RestrictedAccess	No	2004-09-27T02:36:01Z
US CA	Symmetricom, (formerly Datum), San Jose, California		Primarily networks in Western US	OpenAccess	No	2006-08-28T15:54:25Z
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	ViaNet Communications, Palo Alto, CA, USA		All areas	OpenAccess	Yes	2005-04-15T13:23:13Z
US CA	UCLA, Los Angeles, CA		Pacific time zone, others on request	RestrictedAccess	Yes	2014-03-13T19:03:34Z
US CA	San Jose, California		Western US	OpenAccess	No	2006-12-14T17:51:40Z
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	Yes	2014-03-14T14:43:22Z
US CO	NIST Boulder Laboratories, Boulder, Colorado		NSFnet, WESTnet	ClosedAccess	No	2005-08-19T20:44:09Z
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	National Center for Atmospheric Research, Boulder, Colorado		NSFnet, WESTnet	OpenAccess	No	2007-04-06T15:22:35Z
US CO	Schriever, Colorado		US Pacific, Mountain time zones, others by arrangement	RestrictedAccess	Yes	2014-03-14T14:42:04Z
US DC	U.S. Naval Observatory, Washington, DC		Eastern Time Zone, others by arrangement	RestrictedAccess	Yes	2014-03-14T14:40:11Z
US DC	U.S. Naval Observatory, Washington, DC		USA Eastern timezone, others by arrangement	RestrictedAccess	Yes	2014-03-14T14:39:19Z
US DC	U.S. Naval Observatory, Washington, DC		Eastern Time Zone, others by arrangement	RestrictedAccess	Yes	2014-03-14T14:39:46Z
US DE	ECE Department, University of Delaware, Newark, DE 19716		interplanetary	OpenAccess	No	2013-05-31T23:56:12Z
US DE	ECE Department, University of Delaware, Newark, DE 19716		interplanetary	RestrictedAccess	No	2013-05-31T23:56:53Z
US DE	ECE Department, University of Delaware, Newark, DE 19716		US east	OpenAccess	No	2007-10-13T05:17:52Z
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	Yes	2014-03-13T19:08:40Z
US GA	Georgia Institute of Technology, Atlanta, GA		USA Eastern timezone, others by arrangement	RestrictedAccess	Yes	2014-03-13T19:16:35Z
US GA	Columbia County, Georgia			OpenAccess	No	2005-08-19T22:05:36Z
US HI	Maui High Performance Computing Center		Hawaii, others on request	RestrictedAccess	Yes	2014-03-14T14:09:30Z
US IA	USSHC, Monticello Iowa		Planetary	OpenAccess	Yes	2014-05-15T19:15:17Z
US IA	Griswold, IA		Griswold Community Schools, Griswold, IA	OpenAccess	Yes	2013-07-08T13:54:32Z
US IL	University of Illinois, Urbana-Champaign, IL		CICNET, Midwest, NCSA region	ClosedAccess	Yes	2004-09-27T03:24:52Z
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	2010-02-03T03:38:10Z
US IN	CERIAS, Purdue University, West Lafayette, IN		North America	RestrictedAccess	Yes	2010-02-03T03:42:39Z
US IN	LSC, Indianapolis Public Library, Indianapolis, IN, USA		North America	RestrictedAccess	Yes	2010-10-20T17:30:57Z
US IN	CERIAS, Purdue University, West Lafayette, IN		Internet2, CIC and midwest US	RestrictedAccess	Yes	2010-02-03T03:37:07Z
US MA	Massachusetts Institute of Technology, Cambridge, MA		Eastern US	OpenAccess	Yes	2004-09-27T03:31:46Z
US MA	Marblehead, MA		Eastern US	RestrictedAccess	No	2013-07-16T12:29:42Z
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	University of Maryland, College Park, MD		NSFNET, SURA region	ClosedAccess	Yes	2004-09-27T03:41:13Z
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	Yes	2014-03-13T19:19:22Z
US MI	Monroe (Detroit), Michigan		US, Midwest	OpenAccess	No	2008-03-01T21:23:24Z
US MI	Essexville, MI	DigitalEnigma Networks, LLC	North America; US	RestrictedAccess	No	2014-01-31T20:07:32Z
US MI	Southfield, Michigan		Open	OpenAccess	Yes	2007-11-21T21:04:28Z
US MI	Essexville, MI	DigitalEnigma Networks, LLC	North America; US	RestrictedAccess	No	2014-01-31T20:07:47Z
US MO	Washington University, St. Louis, MO		USA Central timezone, others by arrangement.	RestrictedAccess	Yes	2014-03-13T04:05:02Z
US NC	MCNC, Research Triangle Park, NC		NC-REN region	RestrictedAccess	No	2004-09-27T03:45:46Z
US NC	North Carolina State University, Raleigh, NC		South Eastern US	OpenAccess	No	2004-09-27T03:46:59Z
US NJ	Jensen Research Corporation, Ramsey NJ		Eastern US	RestrictedAccess	Yes	2011-12-02T03:15:30Z
US NY	Hurricane Electric, New York City, New York		all areas	OpenAccess	No	2005-04-06T14:03:22Z
US NY	New York City, New York		North Eastern US	OpenAccess	No	2008-03-01T21:26:08Z
US NY	Morningside Campus, Columbia University, New York, NY		NYSERnet	RestrictedAccess	No	2014-03-13T04:34:14Z
US OH	Ohio State University, Columbus, Ohio	OARNet	Central Time Zone, others by arrangement	RestrictedAccess	Yes	2014-03-13T20:03:31Z
US OK	Oklahoma State University, Stillwater, OK		Central Time Zone, others by arrangement	RestrictedAccess	Yes	2014-03-13T19:23:01Z
US OK	Edmond, Oklahoma		Any	OpenAccess	No	2014-07-23T16:14:56Z
US OR	Hillsboro, OR			OpenAccess	No	2011-06-09T19:47:21Z
US PA	Penn State University, University Park, PA		Internet2, PSC/3ROX	OpenAccess	Yes	2009-11-05T21:21:53Z
US PA	BurstNET Technologies, Inc. - Dunmore, PA USA		Global	OpenAccess	No	2013-07-16T18:08:51Z
US PA	Penn State University, University Park, PA		NSFNET, PREPNET, JvNCnet	OpenAccess	No	2009-11-05T17:21:13Z
US PA	Penn State University, University Park, PA		Internet2, vBNS, CERFnet(AT&T IP Services), PSC/NCNE, CASC	ClosedAccess	Yes	2009-11-05T17:20:27Z
US PA	BurstNET Technologies, Inc. - Dunmore, PA USA		Global	OpenAccess	No	2013-07-16T18:05:08Z
US PA	Milford, PA, 18337	Mel's Place	Mel's Place	ClosedAccess	Yes	2013-09-01T01:09:28Z
US TX	University of Houston, Houston, TX		US Central time zone, others on request	RestrictedAccess	Yes	2014-03-13T19:39:32Z
US TX	AT&T CLLI SANGTX01 (San Angelo, TX)	Quintex Alliance Consulting	Texas/US Central, Stratum 1/2 Servers only.	RestrictedAccess	Yes	2014-02-04T21:31:45Z
US UT	XMission Internet, Salt Lake City, Utah		Western US	OpenAccess	No	2012-11-25T00:07:37Z
US UT	Salt Lake City, Utah, USA	XMission	Rocky Mountain West	OpenAccess	No	2013-11-07T17:16:44Z
US VA	McLean, VA		Primarily networks in Eastern US	OpenAccess	No	2007-04-06T15:18:00Z
US WA	Seattle, WA	LCI	British Columbia - Washington - Oregon - Idaho	RestrictedAccess	No	2014-06-04T02:43:36Z
US WA	University of Washington, Seattle, WA		Pacific Northwest	RestrictedAccess	Yes	2014-03-13T19:40:38Z
US WA	Microsoft Corporation, Seattle, Washington		NorthWestNet, NSFnet	OpenAccess	No	2007-11-21T21:09:07Z
US WI	Netwrx Consulting Inc.		Global	OpenAccess	Yes	2012-02-10T23:55:15Z
US WI	Netwrx Consulting Inc.		Global	OpenAccess	Yes	2012-02-10T23:53:19Z
US WI	Computer Science Department, University of Wisconsin-Madison		US/any	RestrictedAccess	Yes	2004-09-27T04:19:16Z
br	ipatinga,mg,brasil		brazil	OpenAccess	Yes	2014-01-11T19:56:09Z

Related topics: RulesOfEngagement, StratumTwoTimeServers, ManagingYourListEntries, SubmittingYourListEntriesViaEmail