Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MTZ callsign genealogy
Currently held by AMERICUS AMATEUR RADIO ASSOCIATION
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 K4MTZ's current licensee, walking backwards.
- Martinez, Saul ANCgranted 2024-10-26cancelled 2024-11-15
Successor callsigns
Callsigns held now by people who previously held K4MTZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MTZ, oldest first.
- AMERICUS AMATEUR RADIO ASSOCIATION GA2009-06-16 → cancelled 2021-06-17
- Martinez, Saul A NC2024-11-15 active