Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KY4UU callsign genealogy
Currently held by BUTLER, AARON
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 KY4UU's current licensee, walking backwards.
- BUTLER, AARONKYgranted 2022-09-22cancelled 2023-01-30
Successor callsigns
Callsigns held now by people who previously held KY4UU.
- BUTLER, AARONKYgranted 2025-02-25