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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

KO9U callsign genealogy

Currently held by Angerame, Paul V

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 KO9U's current licensee, walking backwards.

  1. K7LTDactive· G
    Firkins, Charles RORgranted 2019-03-22
  2. KI7ZQLcancelled· G
    Firkins, Charles RORgranted 2018-07-10cancelled 2019-03-22

Successor callsigns

Callsigns held now by people who previously held KO9U.

  1. AC2MGactive· E
    Angerame, Paul VNYgranted 2021-07-07
  2. N9IOactive· E
    MELHORN, CLAY EINgranted 2016-12-28

All historical holders

Every license row we've seen with the callsign KO9U, oldest first.

  • Angerame, Paul V NY
    2011-08-20 → cancelled 2014-01-14
  • Breitenbach, Scott L UT
    2025-11-26 active
← Back to KO9U License history →