Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO4WSL callsign genealogy
Currently held by Kruszewski SR, Buck 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 KO4WSL's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KO4WSL.
- Kruszewski SR, Buck RALgranted 2025-01-25cancelled 2026-06-19