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
KM4OIO
Valid
Robert R Stewart
License type
Person
Operator class
Extra
Grid square
EM71 (the first four characters only)
Granted
04/08/2023
Expires
04/08/2033
Previous call sign
KM4OIO

FCC License Page QRZ.com Page DMR ID on RadioID

Nothing on this site carries KM4OIO yet (no repeater, APRS station, feeder, weather station or receiving station).

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).