Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4RFU callsign genealogy
Currently held by Thomas, John B
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 K4RFU's current licensee, walking backwards.
- Thomas, John BFLgranted 2025-08-05cancelled 2025-09-27
Successor callsigns
Callsigns held now by people who previously held K4RFU.
No current licensee on record previously held this callsign.