Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4JA callsign genealogy
Currently held by ARNOLD, JONATHAN 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 KC4JA's current licensee, walking backwards.
- ARNOLD, JONATHAN DKYgranted 2017-12-13cancelled 2026-05-12
Successor callsigns
Callsigns held now by people who previously held KC4JA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4JA, oldest first.
- BERNARD, WILLIAM B FL1995-03-27 → cancelled 2007-03-28
- ARNOLD, JONATHAN D KY2026-05-12 active