Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4WRX callsign genealogy
Currently held by SWEATMAN, BRIAN E
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 KF4WRX's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KF4WRX.
- SWEATMAN, BRIAN EFLgranted 1998-09-10cancelled 2010-09-11