Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM7OSO callsign genealogy
Currently held by Thornton, Randolph W
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 KM7OSO's current licensee, walking backwards.
- Thornton, Randolph WWAgranted 2025-07-05cancelled 2025-08-01
Successor callsigns
Callsigns held now by people who previously held KM7OSO.
No current licensee on record previously held this callsign.