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

KB3MJZ callsign genealogy

Currently held by Zweifel, Michael 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 KB3MJZ's current licensee, walking backwards.

  1. KB3YRTcancelled· T
    Zweifel, Michael JPAgranted 2012-05-08cancelled 2012-07-06

Successor callsigns

Callsigns held now by people who previously held KB3MJZ.

  1. K3KMSactive· E
    JERNAKOFF, PETERDEgranted 2025-04-22

All historical holders

Every license row we've seen with the callsign KB3MJZ, oldest first.

  • JERNAKOFF, PETER DE
    2005-06-20 → cancelled 2005-07-15
  • Zweifel, Michael J PA
    2022-05-20 active
← Back to KB3MJZ License history →