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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

KX4XU callsign genealogy

Currently held by COOK, JOEY 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 KX4XU's current licensee, walking backwards.

  1. KN4SGDcancelled· E
    COOK, JOEY LVAgranted 2019-02-11cancelled 2020-03-06

Successor callsigns

Callsigns held now by people who previously held KX4XU.

No current licensee on record previously held this callsign.