NTP Time Servers

The Masterclock NTP100 family of servers provide accurate NTP time and conform to NTP v2 (RFC 1119), v3 (RFC 1306) and NTP v4 (RFC 5905). Each NTP100 device can operate on a local area network (LAN) or act as an enterprise-wide source for legally-traceable accurate time and date distribution, depending upon your network configuration requirements. Masterclock NTP time servers are compatible with IPv4/IPv6 networks and offer SSH encryption, as well as MD5 authentication, for secure communications.

Models NTP100-GPS and NTP100-OSC are also available with an internal HSO (high-stability oscillator) for increased holdover stability.

Click a model below to learn more about Masterclock's NTP100 time servers.


Stratum 1 NTP server locked to GPS satellites for legally traceable time-stamping.


NTP server synchronized to time code input.


NTP server with internal precision temperature controled crystal oscillator.