Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4DXX callsign genealogy
Currently held by THOMPSON, KARIN K
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 KD4DXX's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KD4DXX.
- THOMPSON, KARIN KCOgranted 2003-08-26cancelled 2012-07-03
All historical holders
Every license row we've seen with the callsign KD4DXX, oldest first.
- THOMPSON, KARIN K CO2003-08-26 → cancelled 2012-06-12
- THOMPSON, KARIN K GA2021-09-03 active