Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX4UY callsign genealogy
Currently held by Butler, David L
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 KX4UY's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KX4UY.
- Butler, David LOHgranted 2020-02-14