Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AG4JM callsign genealogy
Currently held by Thacker, Dorsey L
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 AG4JM's current licensee, walking backwards.
- MC DONALD, JEFFREY KVAgranted 2023-03-30cancelled 2023-09-15
Successor callsigns
Callsigns held now by people who previously held AG4JM.
- Thacker, Dorsey LVAgranted 2021-09-07
All historical holders
Every license row we've seen with the callsign AG4JM, oldest first.
- Thacker, Dorsey L VA2000-02-03 → cancelled 2001-09-11
- MC DONALD, JEFFREY K VA2023-09-15 active