Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4JSA callsign genealogy
Currently held by Davidson, Johnny R
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 KD4JSA's current licensee, walking backwards.
- Davidson, Johnny RALgranted 2022-09-21cancelled 2022-10-12
Successor callsigns
Callsigns held now by people who previously held KD4JSA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4JSA, oldest first.
- NASH, IRA R NC1992-02-04 → cancelled 2004-02-05
- Davidson, Johnny R AL2022-10-12 active