Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SBZ callsign genealogy
Currently held by Zawrotny, Stan
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 K4SBZ's current licensee, walking backwards.
- Zawrotny, Stanley BFLgranted 2007-12-12cancelled 2009-01-23
Successor callsigns
Callsigns held now by people who previously held K4SBZ.
No current licensee on record previously held this callsign.