DoD Customers
Please note that this is a non-DoD user portal. Please access our DoD oceanography portal at https://oceanography.navy.mil
DoD NIPRNET ONLY
ntp.usno.navy.mil (192.5.41.42)
Synchronization: NTP V4 primary (USNO Master Clock H-masers )
Location: Time Service Dept., U.S. Naval Observatory, Washington, DC
Access Policy: open access for DoD NIPRNET only. No public access.
This is the recommended NTP server for NIPRNET clients.
SECRET INTERNET PROTOCOL ROUTING NETWORK
ntp-usno.sipr.smil.mil
Location: USNO Time Service, Washington, DC
Synchronization: NTP V3 primary (USNO Master Clocks 1,2)
Access Policy: open access for SIPRnet clients
ntp-amc.sipr.smil.mil
Location: USNO Alternate Master Clock Facility, Shriever AFB, Colorado
Synchronization: NTP V3 primary (USNO Master Clocks 1,2)
Access Policy: open access for SIPRnet clients
