uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-14

N5NBD 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 N5NBD's current licensee, walking backwards.

  1. N5NDBcancelled· A
    ZIMMERMAN, MARK DFLgranted 2018-09-11cancelled 2018-12-01
  2. W1BMWactive· T
    Wylie, Brian MAZgranted 2021-02-12
  3. KJ7TUAcancelled· T
    Wylie, Brian MAZgranted 2021-01-25cancelled 2021-02-12

Successor callsigns

Callsigns held now by people who previously held N5NBD.

  1. W1BMWcancelled· A
    ZIMMERMAN, MARK DFLgranted 2013-01-25cancelled 2018-09-11

All historical holders

Every license row we've seen with the callsign N5NBD, oldest first.

  • ZIMMERMAN, MARK D NJ
    1998-09-25 → cancelled 2001-06-05
  • ZIMMERMAN, MARK D TX
    2018-12-01 active
← Back to N5NBD License history →