Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4JM callsign genealogy
Currently held by BARRIER, ROBERT C
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by AB4JM's current licensee, walking backwards.
- Murray, James LFLgranted 2005-06-21cancelled 2008-03-08
Successor callsigns
Callsigns held now by people who previously held AB4JM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB4JM, oldest first.
- BARRIER, ROBERT C GA1988-07-26 → cancelled 2000-07-27
- Murray, James L GA2017-12-28 active