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

KZ4DU callsign genealogy

Currently held by HENDERSON, ALEX M

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 KZ4DU's current licensee, walking backwards.

  1. WE4MMMcancelled· E
    HENDERSON, ALEX MNCgranted 2023-08-25cancelled 2024-02-05
  2. KQ4KHYcancelled· G
    HENDERSON, ALEXNCgranted 2023-08-05cancelled 2023-08-25

Successor callsigns

Callsigns held now by people who previously held KZ4DU.

  1. WM4WMactive· E
    HENDERSON, ALEX MNCgranted 2024-02-23
← Back to KZ4DU License history →