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

N5NDB callsign genealogy

Currently held by ZIMMERMAN, MARK D

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 N5NDB's current licensee, walking backwards.

  1. W1BMWactive· T
    Wylie, Brian MAZgranted 2021-02-12
  2. KJ7TUAcancelled· T
    Wylie, Brian MAZgranted 2021-01-25cancelled 2021-02-12

Successor callsigns

Callsigns held now by people who previously held N5NDB.

  1. N5NBDactive· A
    ZIMMERMAN, MARK DTXgranted 2018-12-01

All historical holders

Every license row we've seen with the callsign N5NDB, oldest first.

  • HAMER JR, BROWN M LA
    1998-09-04 → cancelled 2010-07-15
  • ZIMMERMAN, MARK D FL
    2018-09-11 → cancelled 2018-12-01
← Back to N5NDB License history →