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

N9AI callsign genealogy

Currently held by BALDRIDGE, DAVE 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 N9AI's current licensee, walking backwards.

  1. N9BMScancelled· E
    BALDRIDGE, DAVE JWIgranted 2002-02-20cancelled 2009-09-26

Successor callsigns

Callsigns held now by people who previously held N9AI.

  1. AI9NLcancelled· E
    Nelson, Harvey AWIgranted 2007-09-05cancelled 2009-08-04
  2. W9ALcancelled· E
    Manthe, Scott AIAgranted 2003-11-11cancelled 2004-09-21
  3. W9ALcancelled· E
    Manthe, Scott AIAgranted 2002-10-25cancelled 2003-01-22

All historical holders

Every license row we've seen with the callsign N9AI, oldest first.

  • MANTHE, SCOTT A IA
    2000-06-27 → cancelled 2002-10-25
  • Manthe, Scott A IA
    2003-01-22 → cancelled 2003-11-11
  • Nelson, Harvey A WI
    2006-01-10 → cancelled 2007-09-05
  • BALDRIDGE, DAVE J WI
    2019-07-02 active
← Back to N9AI License history →