United States Time Server Foundation

NIST Time Servers

The US Time Server Foundation is proud to make avail�able to the US Public the following NIST-Operated Stratum-1 US National Time Servers as a free public-service, and for NSPD-39 Outage Oversight as part of the US National Critical Infrastructure.

Stratum-1 NIST-Operated NTP Time Servers

Servers Name IP Address

S-1 Servers Name	IP Address	Location
nist1-pa.ustiming.org	206.246.122.250	Hatfield PA
nist1-la.ustiming.org	64.147.116.229	Los Angeles CA
nist1-ny.ustiming.org	64.90.182.55	New York NY
nist1-nj.ustiming.org	96.47.67.105	Bridgewater NJ
nist1-lv.ustiming.org	64.250.229.100	Las Vegas NV
nist1-atl.ustiming.org	64.250.177.145	Atlanta GA
nist1-chi.ustiming.org	208.66.170.36	Chicago IL
nist1-sj.ustiming.org	216.171.124.36	San Jose CA
nist1-nj2.ustiming.org	must register to use	Weehawken NJ
San Jose 1-PPS Discipline Source.
SJ-M300-0	216.171.124.72	San Jose CA (Meinberg M300/GPS)
NORAMET Treaty Program Servers Name
Location
mx-la1.ustiming.org	64.147.116.229 (Intl NORAMET)	Los Angeles CA (MX & NIST)
ref0-sj.ustiming.org	216.171.124.18 (Intl NORAMET)	San Jose CA
ca-ntp-ny1.ustiming.org	216.171.124.90 (Intl NORAMET)	New York NY (CA & NIST)

Time Server Use Limitations and Agreements

In addition to the Website Use Terms, the use of the service demonstrates your willingness and agreement to be bound by these terms and conditions including any FOIA and number of time settings per hour restrictions [of up to 4 (four) iburst sessions per hour]. Likewise the hard coding of these addresses into any commercial products is strictly forbidden.

Anyone using this site consents to their IP addresses being captured, their use logged, and for Certichron or the US Time Server Foundation to contact them periodically regarding changes or status of the Foundation's NIST Time Server Programs. Likewise, the use of this service is consent to the application of NTP Kiss of Death (KoD) services to prevent abuse of the time servers, and respecting the network route limitations for the UDP/IP based time service itslef. Users are limited to a 1000m range limitation as such and these use limitations will be enforced by contacting your ISP or internet service provider to force changes in your service for any abuses herein.

The Foudation believes that everyone has a right to access these time servers within a manner and realm where that access does not prevent or impact the accesing of these sites by US Businesses and Citizens local to their operations. They serve a key role in the US Critical Infrastructure and will be procteded as such.

Register with the Foundation

Users are encouraged to register with the Certichron MANTIS site to get notices of changes or planned downtime and to allow you to register requests or service outage compliants.