Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA4MCX callsign genealogy
Currently held by BRINSON, CURTIS I
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 KA4MCX's current licensee, walking backwards.
- Cox, Matthew JSCgranted 2011-09-22cancelled 2015-10-16
Successor callsigns
Callsigns held now by people who previously held KA4MCX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA4MCX, oldest first.
- BRINSON, CURTIS I FL1995-07-26 → cancelled 2007-07-27
- Cox, Matthew J SC2025-11-25 active