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

KU1D callsign genealogy

Currently held by Tanaka, Masaru

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 KU1D's current licensee, walking backwards.

  1. AB1PTcancelled· E
    Tanaka, MasaruCTgranted 2011-09-28cancelled 2011-11-15

Successor callsigns

Callsigns held now by people who previously held KU1D.

  1. N1IMDcancelled· E
    THOMPSON, MICHAEL SNHgranted 2002-03-26cancelled 2009-04-10

All historical holders

Every license row we've seen with the callsign KU1D, oldest first.

  • MC DADE, HARRY C NH
    1994-01-04 → cancelled 1998-04-17
  • THOMPSON, MICHAEL S NH
    2001-08-21 → cancelled 2002-03-26
  • Tanaka, Masaru CT
    2021-08-30 active
← Back to KU1D License history →