The first-level time servers are primarily intended to act as source time servers for second-level time servers. The first-level time servers may also be capable of providing mission-critical time services. Some first-level time servers may have a restricted access policy.
Second-level time servers are intended for general SNTP time service needs. Second-level time servers usually enable public access. We recommend that you use second-level time servers for typical SNTP time server configuration because they are usually located on a closer network that can produce faster updates.
We also recommend that you research any time server selection to make sure that it meets your specific time server requirements.
Time server listNote When you click any of the following links, you may receive an error message that resembles the following:
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- For the list of Stratum One time servers, go to the following website:
- For the list of Stratum Two time servers, go to the following website:
- For the list of NTP pool servers, go to either of the following websites:
Note Please read the "Rules Of Engagement" before you use the Stratum Two time servers list. To read the "Rules of Engagement," go to the following website:
Domain-joined member computers and application servers should be configured to synchronize time by using the domain hierarchy that is described in the "Domain Hierarchy-Based Synchronization" topic at the following Microsoft TechNet website:
To synchronize non-domain-joined (workgroup) workstations or servers, go to the following Microsoft TechNet website: