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

N9MDW callsign genealogy

Currently held by ZIMBELMAN, CLYDE N

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 N9MDW's current licensee, walking backwards.

  1. WA0MDWcancelled· E
    Klotz, ChristianCOgranted 2019-01-01cancelled 2019-06-25
  2. AD0DOcancelled· E
    Klotz, ChristianCOgranted 2013-04-03cancelled 2019-01-01

Successor callsigns

Callsigns held now by people who previously held N9MDW.

  1. KI0QSactive· E
    Zimbelman, Clyde NTXgranted 2023-09-23

All historical holders

Every license row we've seen with the callsign N9MDW, oldest first.

  • ZIMBELMAN, CLYDE N MN
    1994-07-15 → cancelled 1999-09-01
  • Klotz, Christian CO
    2019-06-25 active
← Back to N9MDW License history →