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

AI9T callsign genealogy

Currently held by CZAJA, FRANK

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 AI9T's current licensee, walking backwards.

  1. KB9JDactive· A
    DALE, JEFFREY AILgranted 2024-08-09
  2. K5USMcancelled· A
    DALE, JEFFREY AILgranted 2004-11-16cancelled 2014-09-23
  3. WD8KEScancelled· A
    DALE, JEFFREY ANMgranted 2003-05-29cancelled 2004-11-16

Successor callsigns

Callsigns held now by people who previously held AI9T.

  1. W9XZactive· E
    CZAJA, FRANKWIgranted 2018-03-02

All historical holders

Every license row we've seen with the callsign AI9T, oldest first.

  • Moore, Steven J IL
    2021-12-29 active
  • CZAJA, FRANK
    — → cancelled 1998-05-20
← Back to AI9T License history →