Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX4UK callsign genealogy
Currently held by Ridley, David J
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 KX4UK's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KX4UK.
No current licensee on record previously held this callsign.