Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD1MD callsign genealogy
Currently held by DYER, KIRK 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 KD1MD's current licensee, walking backwards.
- DYER, KIRK TRIgranted 2023-04-07cancelled 2024-01-30
Successor callsigns
Callsigns held now by people who previously held KD1MD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD1MD, oldest first.
- SOUTHWORTH SR, THOMAS E NH1993-01-05 → cancelled 2005-01-06
- DYER, KIRK T RI2024-01-30 active