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

AA9DX callsign genealogy

Currently held by BATES, ROBERT M

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 AA9DX's current licensee, walking backwards.

  1. KE9CLAcancelled· E
    Barriage, John PWIgranted 2025-01-31cancelled 2025-04-29

Successor callsigns

Callsigns held now by people who previously held AA9DX.

  1. W4TTactive· E
    Wu, Jeng-ShiouMIgranted 2021-07-02
  2. W9KCcancelled· E
    WILLIAMSON JR, O GORDONFLgranted 2017-04-21cancelled 2018-01-26

All historical holders

Every license row we've seen with the callsign AA9DX, oldest first.

  • BATES, ROBERT M IL
    2004-11-10 → cancelled 2017-01-27
  • WILLIAMSON JR, O GORDON FL
    2017-03-25 → cancelled 2017-04-21
  • Wu, Jeng-Shiou MI
    2019-05-18 → cancelled 2021-07-02
  • Barriage, John P WI
    2025-04-29 active
← Back to AA9DX License history →