Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4SZ callsign genealogy
Currently held by ZAWACKI, STEPHEN 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 KC4SZ's current licensee, walking backwards.
- ZAWACKI, STEPHEN JFLgranted 2023-10-13
Successor callsigns
Callsigns held now by people who previously held KC4SZ.
- ZAWACKI, STEPHEN JFLgranted 2023-10-13