Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC4DM callsign genealogy
Currently held by HOWARD JR, WILLIAM 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 AC4DM's current licensee, walking backwards.
- Munsey, Donald GKYgranted 1999-02-23cancelled 2007-04-21
Successor callsigns
Callsigns held now by people who previously held AC4DM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AC4DM, oldest first.
- HOWARD JR, WILLIAM C NC1997-04-30 → cancelled 2003-03-06
- Munsey, Donald G KY2017-02-17 active