Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4BMX callsign genealogy
Currently held by ZIMMERER JR, JOSEPH A
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 K4BMX's current licensee, walking backwards.
- Teal, MattALgranted 2005-08-29cancelled 2009-12-04
Successor callsigns
Callsigns held now by people who previously held K4BMX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4BMX, oldest first.
- ZIMMERER JR, JOSEPH A FL1997-07-18 → cancelled 2009-07-21
- Teal, Matt AL2019-09-06 active