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

KZ4J callsign genealogy

Currently held by MASSE, GREGORY A

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 KZ4J's current licensee, walking backwards.

  1. K7SYactive· E
    Hamilton, Kamiah LNVgranted 2022-02-19
  2. KK7BGLcancelled· E
    Hamilton, Kamiah LNVgranted 2021-10-07cancelled 2022-02-19

Successor callsigns

Callsigns held now by people who previously held KZ4J.

  1. W4HGBcancelled· E
    BODENHAMER, HAROLD GNCgranted 2007-02-09cancelled 2014-11-22

All historical holders

Every license row we've seen with the callsign KZ4J, oldest first.

  • EDWARDS, SPENCER C AL
    2010-01-16 → cancelled 2018-01-10
  • MASSE, GREGORY A FL
    2020-01-31 active
← Back to KZ4J License history →