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

NM4O callsign genealogy

Currently held by MISENHEIMER, DAVID C

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 NM4O's current licensee, walking backwards.

  1. KB4FQcancelled· E
    MISENHEIMER, DAVID CNCgranted 1997-07-28cancelled 2005-01-15

Successor callsigns

Callsigns held now by people who previously held NM4O.

  1. KW6Xexpired· E
    INGALLS, LAWRENCE WFLgranted 2012-12-21cancelled 2024-12-14
  2. AK4VTexpired· E
    RIDDLE JR, SAMUEL LVAgranted 2009-03-25cancelled 2021-06-17

All historical holders

Every license row we've seen with the callsign NM4O, oldest first.

  • INGALLS, LAWRENCE W NC
    2001-07-27 → cancelled 2002-12-13
  • MISENHEIMER, DAVID C NC
    2024-11-08 active
  • RIDDLE JR, SAMUEL L
    — → cancelled 1999-06-16
← Back to NM4O License history →