Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SVT callsign genealogy
Currently held by Klosowski, William A
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 K4SVT's current licensee, walking backwards.
- Klosowski, William AGAgranted 2007-12-05cancelled 2008-06-20
Successor callsigns
Callsigns held now by people who previously held K4SVT.
No current licensee on record previously held this callsign.