Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4BZX callsign genealogy
Currently held by TOOTLE, WILLIAM M
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 K4BZX's current licensee, walking backwards.
- TOOTLE, WILLIAM MGAgranted 2020-05-18cancelled 2020-06-09
Successor callsigns
Callsigns held now by people who previously held K4BZX.
No current licensee on record previously held this callsign.