Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA4YMZ callsign genealogy
Currently held by KOONE, CLARENCE E
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 KA4YMZ's current licensee, walking backwards.
- KJ4WVVcancelledCharlotte Metro Amateur GroupNCgranted 2010-08-12cancelled 2010-09-10
Successor callsigns
Callsigns held now by people who previously held KA4YMZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA4YMZ, oldest first.
- KOONE, CLARENCE E NC1998-09-25 → cancelled 2006-08-12
- Charlotte Metro Amateur Group NC2020-07-16 active