DoIT NTP servers

DoIT operates a few NTP (Network Time Protocol) servers that are available for public use. This document describes the service.

DoIT has several stratum-2 or less servers; we do not have our own stratum-1 time source.

The addresses are as follows:

ntp1.doit.wisc.edu
   128.104.30.17
   144.92.9.22
   2607:f388::123:1

ntp2.doit.wisc.edu
   144.92.20.100
   2607:f388::123:2

ntp3.doit.wisc.edu
   144.92.104.20
   2607:f388::123:3