Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4MAA callsign genealogy
Currently held by WATSON JR, THOMAS 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 KD4MAA's current licensee, walking backwards.
- Arnold, MichaelFLgranted 2016-03-10cancelled 2016-04-15
Successor callsigns
Callsigns held now by people who previously held KD4MAA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4MAA, oldest first.
- WATSON JR, THOMAS H VA1992-03-24 → cancelled 2004-03-25
- Arnold, Michael A FL2026-04-02 active