Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AG4MC callsign genealogy
Currently held by Warshel, Robert T
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 AG4MC's current licensee, walking backwards.
- Warshel, Robert TMDgranted 2012-05-25cancelled 2016-04-12
Successor callsigns
Callsigns held now by people who previously held AG4MC.
- Heaton, Dennis RGAgranted 2011-11-19cancelled 2016-08-05
All historical holders
Every license row we've seen with the callsign AG4MC, oldest first.
- Heaton, Dennis GA2011-11-02 → cancelled 2011-11-19
- Warshel, Robert T MD2026-01-21 active