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

KZ5SF callsign genealogy

Currently held by BOYT, JAMES R

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 KZ5SF's current licensee, walking backwards.

  1. WE8Jcancelled· E
    HAYDEN, MELVIN DGAgranted 2021-04-14cancelled 2025-09-16
  2. WW4MELcancelled· E
    HAYDEN, MELVIN DOHgranted 2009-08-01cancelled 2011-06-14
  3. KD8LJPcancelled· T
    Hayden, Melvin DOHgranted 2009-06-10cancelled 2009-08-01

Successor callsigns

Callsigns held now by people who previously held KZ5SF.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KZ5SF, oldest first.

  • BOYT, JAMES R NV
    2013-07-02 → cancelled 2025-07-26
  • HAYDEN, MELVIN D GA
    2025-09-16 active
← Back to KZ5SF License history →