Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5CZX callsign genealogy
Currently held by Garmon, Michael 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 K5CZX's current licensee, walking backwards.
- Garmon, Michael ATXgranted 2025-11-22cancelled 2025-12-12
Successor callsigns
Callsigns held now by people who previously held K5CZX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5CZX, oldest first.
- CHUMLEY, CALVIN C TX2007-02-06 → cancelled 2019-03-22
- Garmon, Michael A TX2025-12-12 active