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

AA4BK 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 AA4BK's current licensee, walking backwards.

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

Successor callsigns

Callsigns held now by people who previously held AA4BK.

  1. K4BJactive· E
    KEYS III, WILLIAM WFLgranted 2020-11-25
  2. KK4HMcancelled· E
    Mc Coin, Harold DTNgranted 2014-02-19cancelled 2020-01-24

All historical holders

Every license row we've seen with the callsign AA4BK, oldest first.

  • KEYS III, WILLIAM W FL
    2000-08-15 → cancelled 2000-12-30
  • Mc Coin, Harold D TN
    2007-04-10 → cancelled 2014-02-19
  • KNOLL, BRIAN F NC
    2023-05-31 active
← Back to AA4BK License history →