Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MKM callsign genealogy
Currently held by Morrison 410, Michael K
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 K4MKM's current licensee, walking backwards.
- Morrison, Michael RKYgranted 2018-05-18cancelled 2019-02-26
Successor callsigns
Callsigns held now by people who previously held K4MKM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MKM, oldest first.
- MC CLAIN, ROBERT L NC1995-01-12 → cancelled 2007-01-13
- Morrison 410, Michael K KY2019-02-26 active