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

AB9TT callsign genealogy

Currently held by Tibbitts, Thomas

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 AB9TT's current licensee, walking backwards.

  1. KD9TOMcancelled· E
    Tibbitts, ThomasWIgranted 2016-06-14cancelled 2022-01-14
  2. KD9GJEcancelled· T
    Tibbitts, ThomasWIgranted 2016-05-25cancelled 2016-06-14

Successor callsigns

Callsigns held now by people who previously held AB9TT.

  1. KQ9Oactive· E
    Bird, Julio JWIgranted 2020-09-09

All historical holders

Every license row we've seen with the callsign AB9TT, oldest first.

  • Bird, Julio J WI
    2009-03-05 → cancelled 2009-06-09
  • Tibbitts, Thomas WI
    2022-01-14 active
← Back to AB9TT License history →