Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4MI callsign genealogy
Currently held by GILLROY, KENNETH M
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 KM4MI's current licensee, walking backwards.
- DOERHOEFER, K MICHAELFLgranted 1996-05-01cancelled 2003-06-25
Successor callsigns
Callsigns held now by people who previously held KM4MI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM4MI, oldest first.
- GILLROY, KENNETH M FL1989-01-17 → cancelled 2001-01-18
- DOERHOEFER, K MICHAEL FL2023-04-18 active