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

AB9ZS callsign genealogy

Currently held by Kaczorek, Claude 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 AB9ZS's current licensee, walking backwards.

  1. AB9ZRcancelled· E
    Kaczorek, Claude JWIgranted 2002-08-19cancelled 2011-08-03
  2. KC9CHKcancelled· E
    Kaczorek, Claude JWIgranted 2002-08-19cancelled 2011-08-01

Successor callsigns

Callsigns held now by people who previously held AB9ZS.

  1. AC9ABactive· E
    Kaczorek, ClaudeWIgranted 2022-07-02
← Back to AB9ZS License history →