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

N1IMD callsign genealogy

Currently held by THOMPSON, MICHAEL S

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 N1IMD's current licensee, walking backwards.

  1. KU1Dactive· E
    Tanaka, MasaruCTgranted 2021-08-30
  2. AB1PTcancelled· E
    Tanaka, MasaruCTgranted 2011-09-28cancelled 2011-11-15

Successor callsigns

Callsigns held now by people who previously held N1IMD.

  1. W1USactive· E
    THOMPSON, MICHAEL SNHgranted 2019-01-30
  2. KU1Dcancelled· E
    THOMPSON, MICHAEL SNHgranted 2001-08-21cancelled 2002-03-26

All historical holders

Every license row we've seen with the callsign N1IMD, oldest first.

  • THOMPSON, MICHAEL S NH
    2000-11-22 → cancelled 2001-08-21
  • THOMPSON, MICHAEL S NH
    2002-03-26 → cancelled 2009-04-10
← Back to N1IMD License history →