Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX4JRK callsign genealogy
Currently held by Kettenhofen, Jon 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 KX4JRK's current licensee, walking backwards.
- Kettenhofen, Jon RGAgranted 2014-09-22cancelled 2014-10-15
Successor callsigns
Callsigns held now by people who previously held KX4JRK.
No current licensee on record previously held this callsign.