Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF5ZF callsign genealogy
Currently held by BROWN, WILLIAM 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 KF5ZF's current licensee, walking backwards.
- Zaitz, John ATXgranted 2020-02-25cancelled 2025-04-29
Successor callsigns
Callsigns held now by people who previously held KF5ZF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF5ZF, oldest first.
- BROWN, WILLIAM B TX1997-03-13 → cancelled 2009-03-14
- Zaitz, John A TX2025-04-29 active