Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC9SKI callsign genealogy
Currently held by Rygelski, Matthew J
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 KC9SKI's current licensee, walking backwards.
- Rygelski, Matthew JILgranted 2003-12-01cancelled 2004-10-08
Successor callsigns
Callsigns held now by people who previously held KC9SKI.
No current licensee on record previously held this callsign.