Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX4LU 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 KX4LU's current licensee, walking backwards.
- Ridley, David JSCgranted 2017-02-07cancelled 2018-06-26
Successor callsigns
Callsigns held now by people who previously held KX4LU.
- Ridley, David JTNgranted 2018-07-20