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NTP Server Information

The Network Time Protocol (NTP) is a mechanism for synchronising the time on computers. When the full NTP implementation is used, it is capable of maintaining the same time on two computers with an accuracy of around 1-30 ms despite the varying delays in internet propagation. Further information about NTP can be obtained from the main NTP website at

The MSL NTP server is synchronised using a 1 pulse per second signal to the New Zealand time standard. The server time is typically stable with respect to the time in the caesium clocks to around 1 microsecond, but the variability in the network delays limits the accuracy in remote clocks.

The servers are publicly available to all connections from within NZ. (Note: these servers only respond to NTP and "Simple Network Time Protocol” (SNTP) requests. They do not respond to "datetime" requests).

Any emails about the service should be directed to

Using the servers

The servers are currently available to all users but serious users i.e. those for whom the time is important are asked to register their use of the server with MSL by sending the IP address of their server (a static address is required) and a contact email address to Please limit your access to at most three servers and make any additional servers connect to what will be your three stratum 2 clocks.

The complete NTP distribution for either Unix or Windows

This is not intended to be a complete description about configuring NTP. You should consult the documentation at or the "NTP FAQ". To get time from MSL, use the following url: