Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4JFP callsign genealogy
Currently held by FREDRICKSON, FRITZ
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 K4JFP's current licensee, walking backwards.
- PARRISH, JONATHANFLgranted 2023-05-16cancelled 2023-06-27
Successor callsigns
Callsigns held now by people who previously held K4JFP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4JFP, oldest first.
- FREDRICKSON, FRITZ FL1989-05-09 → cancelled 2001-05-10
- PARRISH, JONATHAN FL2023-06-27 active