Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4SO callsign genealogy
Currently held by WILLIAMS, JOHN T
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 KM4SO's current licensee, walking backwards.
- WILLIAMS, JOHN Tcancelled 1997-10-15
Successor callsigns
Callsigns held now by people who previously held KM4SO.
- LINCOLN, LOUIE NGAgranted 2023-05-27