Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4ZMA callsign genealogy
Currently held by FETZER, FRANK
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 W4ZMA's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W4ZMA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4ZMA, oldest first.
- FETZER, FRANK WV1998-06-18 → cancelled 2010-06-19
- PORFERT, FREDERIC N FL2025-08-16 active