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

W9MB callsign genealogy

Currently held by ZOCHERT SR, DONALD P

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 W9MB's current licensee, walking backwards.

  1. N9NBNactive· T
    BOILEAU, NATHAN DWIgranted 2024-04-11
  2. KC9WJVcancelled· T
    BOILEAU, NATHAN DWIgranted 2012-08-07cancelled 2013-07-27

Successor callsigns

Callsigns held now by people who previously held W9MB.

  1. W9JKactive· E
    Klusman, James EINgranted 2019-03-26

All historical holders

Every license row we've seen with the callsign W9MB, oldest first.

  • ZOCHERT SR, DONALD P IL
    1994-10-20 → cancelled 2006-10-21
  • Klusman, James E IN
    2006-11-10 → cancelled 2009-06-19
  • BOILEAU, MICHAEL S WI
    2021-07-27 active
← Back to W9MB License history →