Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4JON callsign genealogy
Currently held by Gonyo, F John
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 KK4JON's current licensee, walking backwards.
- Rainwater, Jonathan DTNgranted 2021-10-04cancelled 2021-10-22
Successor callsigns
Callsigns held now by people who previously held KK4JON.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KK4JON, oldest first.
- Gonyo, F John FL2007-04-03 → cancelled 2019-04-04
- Rainwater, Jonathan D TN2021-10-22 active