Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4ZMX callsign genealogy
Currently held by Gwynn, Glenn 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 W4ZMX's current licensee, walking backwards.
- Gwynn, Glenn RVAgranted 2024-06-04cancelled 2024-12-13
Successor callsigns
Callsigns held now by people who previously held W4ZMX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4ZMX, oldest first.
- REDBURN, CALVIN J NC1997-09-24 → cancelled 2009-09-25
- Gwynn, Glenn R VA2024-12-13 active