Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4ASL callsign genealogy
Currently held by DAVIS, JEAN F
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 KD4ASL's current licensee, walking backwards.
- Rudnicki, Michael DFLgranted 2010-06-25cancelled 2010-07-20
Successor callsigns
Callsigns held now by people who previously held KD4ASL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4ASL, oldest first.
- DAVIS, JEAN F SC1991-05-14 → cancelled 2003-05-15
- Rudnicki, Michael D KY2020-06-01 active