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

NZ4J callsign genealogy

Currently held by HAYRINEN, RISTO L

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 NZ4J's current licensee, walking backwards.

  1. WZ4Tactive· E
    ANDERS JR, STERLING PNCgranted 2025-06-07
  2. KZ4TFcancelled· E
    ANDERS JR, STERLING PNCgranted 2025-04-08cancelled 2025-06-07
  3. KR4DAGcancelled· E
    ANDERS JR, STERLING PNCgranted 2025-04-08cancelled 2025-05-19

Successor callsigns

Callsigns held now by people who previously held NZ4J.

  1. KK4NAactive· E
    Mc Ginnis, James RFLgranted 2021-04-09
  2. W3LNXcancelled· E
    Herbert III, Frederick SSCgranted 2008-02-05cancelled 2009-01-21

All historical holders

Every license row we've seen with the callsign NZ4J, oldest first.

  • HAYRINEN, RISTO L FL
    1995-01-19 → cancelled 2007-01-20
  • Herbert III, Frederick S SC
    2007-02-21 → cancelled 2008-02-05
  • mc Ginnis, James R FL
    2020-01-27 → cancelled 2021-04-09
  • YARBOROUGH, RICHARD L NC
    2023-05-19 active
← Back to NZ4J License history →