Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4MT callsign genealogy
Currently held by IMMELL, SHIRLEY 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 KM4MT's current licensee, walking backwards.
- Sterlachini III, Michael TSCgranted 2024-02-06cancelled 2024-05-10
Successor callsigns
Callsigns held now by people who previously held KM4MT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM4MT, oldest first.
- IMMELL, SHIRLEY E FL1998-09-18 → cancelled 2010-09-21
- Sterlachini III, Michael T SC2024-05-10 active