Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KJ4ZOF callsign genealogy
Currently held by King, Ronnie
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 KJ4ZOF's current licensee, walking backwards.
- King, RonnieALgranted 2010-10-28cancelled 2010-12-14
Successor callsigns
Callsigns held now by people who previously held KJ4ZOF.
- King, ronnieALgranted 2021-03-12cancelled 2022-06-22