Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MTW callsign genealogy
Currently held by Waller JR, Thomas 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 K4MTW's current licensee, walking backwards.
- Waller JR, Thomas EALgranted 2013-05-16cancelled 2014-02-01
Successor callsigns
Callsigns held now by people who previously held K4MTW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MTW, oldest first.
- ACETO, LOUIS J VA1993-03-30 → cancelled 2005-03-31
- Waller JR, Thomas E AL2024-01-19 active