Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX4AT callsign genealogy
Currently held by Cooper, William E
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 KX4AT's current licensee, walking backwards.
- Cooper, William EALgranted 2016-09-12cancelled 2017-02-06
Successor callsigns
Callsigns held now by people who previously held KX4AT.
No current licensee on record previously held this callsign.