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

AC1OH callsign genealogy

Currently held by Speth, Donald R

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 AC1OH's current licensee, walking backwards.

  1. AG7SQcancelled· E
    Speth, Donald RMAgranted 2019-03-06cancelled 2023-01-17
  2. AB1QZcancelled· E
    Speth, Donald RWAgranted 2018-05-04cancelled 2019-03-06
  3. KB1WPMcancelled· E
    Speth, Donald RMAgranted 2012-02-03cancelled 2012-05-07
  4. KB1NULcancelled· G
    Speth, Donald RMAgranted 2008-06-18cancelled 2012-02-03
  5. KH7MVcancelled· G
    Speth, Donald RMAgranted 1998-07-28cancelled 2006-07-18
  6. KE4YFWcancelled· P
    SPETH, DONALD Rcancelled 1998-07-28

Successor callsigns

Callsigns held now by people who previously held AC1OH.

  1. AE0YBcancelled· E
    Speth, Donald RTXgranted 2024-02-08cancelled 2024-06-06
← Back to AC1OH License history →