Public NTP Time Servers are divided into stratum 1 and stratum 2 servers. Further information on their usage can be found at:
http://www.eecis.udel.edu/~mills/ntp/servers.html
The National Institute of Standards and Technology (NIST), an agency of the Department of Commerce maintains several Time servers across the USA.
time-a.nist.gov | NIST, Gaithersburg, Maryland | |
time-b.nist.gov | NIST, Gaithersburg, Maryland | |
time-a.timefreq.bldrdoc.gov | NIST, Boulder, Colorado | |
time-b.timefreq.bldrdoc.gov | NIST, Boulder, Colorado | |
time-c.timefreq.bldrdoc.gov | NIST, Boulder, Colorado | |
utcnist.colorado.edu | University of Colorado, Boulder | |
time.nist.gov | NCAR, Boulder, Colorado | |
nist1.datum.com | Datum, San Jose, California |
How to Add a Time Server to the Date & Time control panel
2. Check "Use a Network Time Server".
3. Click the "Server Options" button.
4. Select Edit List from the Network Time Server menu.
5. Click the Add button in the Edit Server List window.
The Add window appears.
6. Enter the location from above into the Descriptive Name field
7. Enter either the name or IP address into the Server Address field.
8. Click the "Add" button to complete the entry.
9. Select a Time Server in the list.
10. Click the "Done" button in the Edit Server List window.
How to Activate the Time Server Option
2. Click the "OK" button to complete the Server Options window.