Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA4TMT callsign genealogy
Currently held by Mathes, Raymond S
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 KA4TMT's current licensee, walking backwards.
- Mathes, Raymond SFLgranted 2019-05-06cancelled 2020-06-09
Successor callsigns
Callsigns held now by people who previously held KA4TMT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA4TMT, oldest first.
- OWEN, RANDOLPH M VA2002-04-03 → cancelled 2014-07-01
- Mathes, Raymond S IN2020-06-09 active