Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF4CQ callsign genealogy
Currently held by SCHMIDT, WILLIAM 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 KF4CQ's current licensee, walking backwards.
- JOHNSON JR, FRANK EFLgranted 2006-08-04cancelled 2011-11-11
Successor callsigns
Callsigns held now by people who previously held KF4CQ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF4CQ, oldest first.
- SCHMIDT, WILLIAM E GA1998-08-28 → cancelled 2010-08-31
- JOHNSON JR, FRANK E FL2021-09-28 active