Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4FBX callsign genealogy
Currently held by ZUFELT, MICHAEL L
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 KB4FBX's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KB4FBX.
- ZUFELT, MICHAEL LFLgranted 2024-07-10