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

N9KX callsign genealogy

Currently held by MARCUM, STEVEN 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 N9KX's current licensee, walking backwards.

  1. KE7UZCcancelled· E
    COLE, NILEUTgranted 2018-11-07cancelled 2021-05-22

Successor callsigns

Callsigns held now by people who previously held N9KX.

  1. W9HHactive· E
    MARCUM, STEVEN JILgranted 2024-12-07
  2. N9FBcancelled· E
    JOHNSTON, ROBERTKSgranted 2019-05-03cancelled 2023-10-11
  3. K9KXactive· E
    HANNAPPEL, HANS WGAgranted 2018-12-11

All historical holders

Every license row we've seen with the callsign N9KX, oldest first.

  • HANNAPPEL, HANS W FL
    2006-09-20 → cancelled 2009-03-10
  • MARCUM, STEVEN J IL
    2011-04-12 → cancelled 2015-01-16
  • JOHNSTON, ROBERT W IN
    2017-02-04 → cancelled 2019-05-03
  • COLE, NILE UT
    2021-05-22 active
← Back to N9KX License history →