Call Signs, Contacts and Talkgroups

Look up a US amateur call sign, find a DMR contact, or see the talkgroups repeaters use, all in one place.
Call Sign LookupDMR ContactsTalkgroups
AC4AC
Valid
Adam C Cox
License type
Person
Operator class
Extra
Grid square
EN70 (the first four characters only)
Granted
06/11/2026
Expires
06/21/2036
Previous call sign
KK4NTQ

FCC License Page QRZ.com Page DMR ID on RadioID

Everything We Know About AC4AC On This Site
Sonde receiving station
AC4AC
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Only the licensee's name, class, status, dates and city and state are shown, never a street address. License data: FCC public records through Callook.info. QRZ.com opens in a new tab (its own terms and any sign-in apply).