Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ4BU callsign genealogy
Currently held by KOPECKY, MATTHEW
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 KZ4BU's current licensee, walking backwards.
- KOPECKY, MATTHEWKYgranted 2023-10-20cancelled 2023-11-06
Successor callsigns
Callsigns held now by people who previously held KZ4BU.
- KOPECKY, MATTHEWKYgranted 2024-07-30cancelled 2024-12-24