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

K9KZ callsign genealogy

Currently held by PLANCK, WILLIAM 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 K9KZ's current licensee, walking backwards.

  1. KE9Kactive· E
    CANNOVA, JOSEPH SILgranted 2015-03-25
  2. K9WITactive· E
    Rector, MichaelCOgranted 2018-08-21
  3. KD0OZZcancelled· E
    Rector, MichaelCOgranted 2011-06-23cancelled 2018-08-21

Successor callsigns

Callsigns held now by people who previously held K9KZ.

  1. KE9Kcancelled· E
    PLANCK, WILLIAM DINgranted 2001-05-11cancelled 2002-12-27

All historical holders

Every license row we've seen with the callsign K9KZ, oldest first.

  • PLANCK, WILLIAM D IN
    1999-03-22 → cancelled 2001-05-11
  • PLANCK, WILLIAM D IN
    2025-05-13 active
← Back to K9KZ License history →