Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4RXX callsign genealogy
Currently held by SPENCER, CHARLES C
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 K4RXX's current licensee, walking backwards.
- FREW, REX AKYgranted 2009-12-02cancelled 2014-04-08
- KB8ACVno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held K4RXX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4RXX, oldest first.
- SPENCER, CHARLES C FL1987-09-29 → cancelled 1999-09-30
- FREW, REX A KY2025-03-27 active