Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4FJF callsign genealogy
Currently held by Rubin, Ronald S
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 KK4FJF's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KK4FJF.
- Rubin, Ronald SFLgranted 2020-09-09