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

AB1DT callsign genealogy

Currently held by O Hara III, William H

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 AB1DT's current licensee, walking backwards.

  1. KB1LEHcancelled· E
    O Hara III, William HMAgranted 2002-09-20cancelled 2004-05-14
  2. KB1IUBcancelled· G
    O Hara III, William HMAgranted 2002-09-20cancelled 2004-04-14

Successor callsigns

Callsigns held now by people who previously held AB1DT.

  1. N1EYactive· E
    O Hara III, William HMAgranted 2024-05-31
← Back to AB1DT License history →