Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KY4ATC callsign genealogy
Currently held by Castle, Andrew T
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 KY4ATC's current licensee, walking backwards.
- Castle, Andrew TKYgranted 2018-01-19cancelled 2018-02-10
Successor callsigns
Callsigns held now by people who previously held KY4ATC.
No current licensee on record previously held this callsign.