Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4Q callsign genealogy
Currently held by Busbin, William R
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 KF4Q's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KF4Q.
- SIMMONS, ROGER CVAgranted 2019-04-13
All historical holders
Every license row we've seen with the callsign KF4Q, oldest first.
- Busbin, William R FL2021-05-05 active
- SIMMONS, ROGER C— → cancelled 1999-06-30