Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4JN callsign genealogy
Currently held by NELSON, JAMES E
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 AB4JN's current licensee, walking backwards.
- NELSON, JAMES ESCgranted 2011-02-09cancelled 2018-07-24
Successor callsigns
Callsigns held now by people who previously held AB4JN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB4JN, oldest first.
- FROST III, THOMAS L GA1988-07-26 → cancelled 2000-07-27
- NELSON, JAMES E SC2018-07-24 active