Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4GC callsign genealogy
Currently held by THON, WILLIAM R
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 AB4GC's current licensee, walking backwards.
- Thon, Benjamin TDCgranted 2020-12-01cancelled 2025-12-09
Successor callsigns
Callsigns held now by people who previously held AB4GC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB4GC, oldest first.
- THON, WILLIAM R FL2018-04-26 → cancelled 2023-10-24
- Thon, Benjamin T DC2025-12-09 active