uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-14

KU4X callsign genealogy

Currently held by KARRIKER, FRANK W

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 KU4X's current licensee, walking backwards.

  1. KA1NOScancelled· E
    Chandler, Bruce HALgranted 2014-11-01cancelled 2016-11-26
  2. WE4AUactive· E
    Crenshaw, Tom AALgranted 2019-11-30
  3. KN4VLAcancelled· E
    Crenshaw, Tom AALgranted 2019-06-26cancelled 2019-11-30

Successor callsigns

Callsigns held now by people who previously held KU4X.

  1. AI4WAactive· E
    Chandler, Bruce HALgranted 2025-03-11

All historical holders

Every license row we've seen with the callsign KU4X, oldest first.

  • KARRIKER, FRANK W NC
    2004-08-13 → cancelled 2016-11-05
  • Chandler, Bruce H AL
    2016-11-26 → cancelled 2025-03-11
← Back to KU4X License history →