Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4FP callsign genealogy
Currently held by Pizarro Cabanillas, Fabian
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 KC4FP's current licensee, walking backwards.
- Cabanillas, FabianCAgranted 2026-07-29cancelled 2026-08-18
Successor callsigns
Callsigns held now by people who previously held KC4FP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4FP, oldest first.
- GALLAGHER, JOSEPH J FL2004-10-28 → cancelled 2017-01-06
- Pizarro Cabanillas, Fabian CA2026-08-18 active