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

AC9J callsign genealogy

Currently held by Oyama, Masaaki

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 AC9J's current licensee, walking backwards.

  1. AB9VYcancelled· E
    Oyama, MasaakiINgranted 2010-03-12cancelled 2010-03-30

Successor callsigns

Callsigns held now by people who previously held AC9J.

  1. N9AEactive· E
    FRANK, LA VONNE MWIgranted 2016-11-07
  2. W0NJcancelled· E
    Loudenburg, MerlinSDgranted 2007-02-08cancelled 2017-01-06

All historical holders

Every license row we've seen with the callsign AC9J, oldest first.

  • Loudenburg, Merlin L MN
    2006-04-11 → cancelled 2007-02-08
  • Oyama, Masaaki IN
    2020-02-25 active
← Back to AC9J License history →