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

KZ5X callsign genealogy

Currently held by HAVARD, ROBERT 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 KZ5X's current licensee, walking backwards.

  1. KO5KWcancelled· E
    KAZMIERCZAK, MICHAEL JCAgranted 2022-08-30cancelled 2024-05-17
  2. AE6Factive· E
    ROWLEY, KARL PCAgranted 2024-09-21
  3. KS6Jcancelled· E
    ROWLEY, KARL PCAgranted 2024-02-09cancelled 2024-09-21
  4. N6KAAcancelled· E
    ROWLEY, KARL PCAgranted 2023-11-14cancelled 2024-02-09
  5. KG6MAWcancelled· G
    ROWLEY, KARL PCAgranted 2022-07-22cancelled 2023-11-14

Successor callsigns

Callsigns held now by people who previously held KZ5X.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KZ5X, oldest first.

  • HAVARD, ROBERT J TX
    1988-09-27 → cancelled 2000-09-28
  • COLLINS, K. DAN TX
    2012-04-27 → cancelled 2024-04-30
  • KAZMIERCZAK, MICHAEL J TX
    2024-05-17 active
← Back to KZ5X License history →