time-a.nist.gov
time-b.nist.gov
time-a.timefreq.bldrdoc.gov
time-b.timefreq.bldrdoc.gov
time-c.timefreq.bldrdoc.gov
utcnist.colorado.edu
time.nist.gov
time-nw.nist.gov
nist1.datum.com
nist1.dc.glassey.com
nist1.ny.glassey.com
nist1.sj.glassey.com
nist1.aol-ca.truetime.com
nist1.aol-va.truetime.com