Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4KTZ callsign genealogy
Currently held by BAUER, 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 KF4KTZ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KF4KTZ.
No current licensee on record previously held this callsign.