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

K9GZR callsign genealogy

Currently held by MATHEWS, JACK A

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 K9GZR's current licensee, walking backwards.

  1. N9DAWactive· E
    Daw, Brian WILgranted 2020-03-21
  2. KD9OXDcancelled· T
    Daw, Brian WILgranted 2020-02-21cancelled 2020-03-21

Successor callsigns

Callsigns held now by people who previously held K9GZR.

  1. W9YDactive· E
    WAMPNER, JOHN VINgranted 2019-10-15

All historical holders

Every license row we've seen with the callsign K9GZR, oldest first.

  • MATHEWS, JACK A IN
    1988-11-29 → cancelled 2000-11-30
  • WAMPNER, JOHN V IN
    2003-01-25 → cancelled 2010-01-08
← Back to K9GZR License history →