Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4DMJ callsign genealogy
Currently held by GOOD IV, WILLIAM H
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 KD4DMJ's current licensee, walking backwards.
- Robinson, David MKYgranted 2026-03-18cancelled 2026-04-07
Successor callsigns
Callsigns held now by people who previously held KD4DMJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4DMJ, oldest first.
- GOOD IV, WILLIAM H GA1991-08-06 → cancelled 2003-08-07
- Robinson, David M KY2026-04-07 active