Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4ULF callsign genealogy
Currently held by AOUN, RENE 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 K4ULF's current licensee, walking backwards.
- AOUN, RENE RFLgranted 2019-06-12cancelled 2019-07-02
Successor callsigns
Callsigns held now by people who previously held K4ULF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ULF, oldest first.
- STEWART, WILLIAM E FL1988-03-22 → cancelled 2000-03-23
- AOUN, RENE R FL2019-07-02 active