Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4DT callsign genealogy
Currently held by Dall, Thomas D
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 KD4DT's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KD4DT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4DT, oldest first.
- GARDNER, GLENN P AL1996-03-14 → cancelled 2008-03-15
- Dall, Thomas D CO2018-06-08 active