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

AI4TB callsign genealogy

Currently held by Bagley, Todd

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 AI4TB's current licensee, walking backwards.

  1. N4ACQcancelled· E
    Bagley, ToddFLgranted 2022-04-02cancelled 2022-08-19
  2. KD9SKKcancelled· E
    Bagley, ToddFLgranted 2021-04-12cancelled 2022-04-02

Successor callsigns

Callsigns held now by people who previously held AI4TB.

  1. NZ4Jcancelled· E
    Herbert III, Frederick SSCgranted 2007-02-21cancelled 2008-02-05

All historical holders

Every license row we've seen with the callsign AI4TB, oldest first.

  • Herbert III, Frederick S SC
    2005-03-02 → cancelled 2007-02-21
  • Bagley, Todd FL
    2022-08-19 active
← Back to AI4TB License history →