Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR4JK callsign genealogy
Currently held by Bradley, James J
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 KR4JK's current licensee, walking backwards.
- Kilpatrick, Kenneth RALgranted 2025-03-12cancelled 2025-05-30
Successor callsigns
Callsigns held now by people who previously held KR4JK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KR4JK, oldest first.
- Bradley, James J VA2003-12-30 → cancelled 2015-12-31
- Kilpatrick, Kenneth R AL2025-05-30 active