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

KZ4X callsign genealogy

Currently held by GEE, OLIVER 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 KZ4X's current licensee, walking backwards.

  1. WG8Ucancelled· E
    GEE, OLIVER JALgranted 2024-08-30cancelled 2024-09-27
  2. KQ4TKIcancelled· E
    GEE, OLIVER JALgranted 2024-05-29cancelled 2024-08-30
  3. KQ4SKKcancelled· G
    Gee, Oliver JALgranted 2024-05-29cancelled 2024-06-28

Successor callsigns

Callsigns held now by people who previously held KZ4X.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KZ4X, oldest first.

  • GREENFIELD, MICKEY M FL
    2012-07-25 → cancelled 2024-09-10
  • GEE, OLIVER J AL
    2024-09-27 active
← Back to KZ4X License history →