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

NA9UI callsign genealogy

Currently held by Lachenmann, Marcel J

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 NA9UI's current licensee, walking backwards.

  1. W9FRGactive
    Local Emergency Field Radio Operating GroupWIgranted 2019-06-18
  2. KC9QDHcancelled
    Local Emergency Field Radio Operating GroupWIgranted 2009-07-06cancelled 2009-08-04

Successor callsigns

Callsigns held now by people who previously held NA9UI.

  1. AF9RGexpired· E
    Lachenmann, Marcel JWIgranted 2001-07-28cancelled 2013-07-30
← Back to NA9UI License history →