Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4SLW callsign genealogy
Currently held by WILLIAMS, MICHAEL R
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 KC4SLW's current licensee, walking backwards.
- KC4MKUno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KC4SLW.
No current licensee on record previously held this callsign.