Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KY4YU callsign genealogy
Currently held by BERZINSKAS III, WILLIAM M
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 KY4YU's current licensee, walking backwards.
- BERZINSKAS III, WILLIAM MNCgranted 2023-02-07cancelled 2023-06-26
Successor callsigns
Callsigns held now by people who previously held KY4YU.
- BERZINSKAS III, WILLIAM MNCgranted 2023-02-07cancelled 2024-05-21