Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM1USR callsign genealogy
Currently held by McDonald, Keith 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 KM1USR's current licensee, walking backwards.
- McDonald, Keith MMAgranted 2017-06-15cancelled 2020-05-01
Successor callsigns
Callsigns held now by people who previously held KM1USR.
No current licensee on record previously held this callsign.