Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4USN callsign genealogy
Currently held by Harvey, Michael S
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 KM4USN's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KM4USN.
- Harvey, Michael SNCgranted 2016-07-06