Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB7CZ callsign genealogy
Currently held by NIX, JOHN S
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 KB7CZ's current licensee, walking backwards.
- Czarnecki, William JWAgranted 2012-10-19cancelled 2015-12-18
Successor callsigns
Callsigns held now by people who previously held KB7CZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB7CZ, oldest first.
- NIX, JOHN S WA1988-11-01 → cancelled 2000-11-02
- Czarnecki, William J WA2026-06-19 active