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

AC4HM callsign genealogy

Currently held by Mc Coin, Harold D

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 AC4HM's current licensee, walking backwards.

  1. KK4HMcancelled· E
    Mc Coin, Harold DTNgranted 2014-02-19cancelled 2020-01-24
  2. AA4BKactive· E
    KNOLL, BRIAN FNCgranted 2023-05-31
  3. KY4XOcancelled· E
    KNOLL, BRIAN FNCgranted 2023-04-28cancelled 2023-05-31
  4. KB4CPUcancelled· E
    KNOLL, BRIAN FNCgranted 2023-04-28cancelled 2023-05-04
  5. KQ4HPEcancelled· G
    KNOLL, BRIAN FNCgranted 2023-04-05cancelled 2023-04-28

Successor callsigns

Callsigns held now by people who previously held AC4HM.

  1. K8HSYactive· E
    MILLIMAN, Ronald EKYgranted 2022-07-16

All historical holders

Every license row we've seen with the callsign AC4HM, oldest first.

  • MILLIMAN, RONALD E KY
    2011-05-12 → cancelled 2012-08-31
  • Mc Coin, Harold D TN
    2020-01-24 active
← Back to AC4HM License history →