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Confidence: Medium · Source: FCC ULS · As of 2026-09-12

K4BJ callsign genealogy

Currently held by KEYS III, WILLIAM 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 K4BJ's current licensee, walking backwards.

  1. AA4BKactive· E
    KNOLL, BRIAN FNCgranted 2023-05-31
  2. KY4XOcancelled· E
    KNOLL, BRIAN FNCgranted 2023-04-28cancelled 2023-05-31
  3. KB4CPUcancelled· E
    KNOLL, BRIAN FNCgranted 2023-04-28cancelled 2023-05-04
  4. KQ4HPEcancelled· G
    KNOLL, BRIAN FNCgranted 2023-04-05cancelled 2023-04-28

Successor callsigns

Callsigns held now by people who previously held K4BJ.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K4BJ, oldest first.

  • FELTON, LAWRENCE E FL
    1990-06-05 → cancelled 1998-12-10
  • KEYS III, WILLIAM W FL
    2020-11-25 active
← Back to K4BJ License history →