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

W6ZO callsign genealogy

Currently held by Zuill, Fred

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 W6ZO's current licensee, walking backwards.

  1. N6GITcancelled· E
    Zuill, FredCAgranted 2023-04-29cancelled 2024-12-13
  2. KN6ZDScancelled· G
    Zuill, FredCAgranted 2023-03-30cancelled 2023-04-29

Successor callsigns

Callsigns held now by people who previously held W6ZO.

  1. K6DKactive· E
    Zuill, FredCAgranted 2025-01-24
  2. W6CZactive· E
    MELCHER, DONALD FCAgranted 2024-03-23
  3. AJ6YXcancelled· E
    SANDERS, PHILLIP LCAgranted 2016-05-24cancelled 2022-12-10
  4. W6KEVexpired· E
    RINAUDO, RAYMOND FCAgranted 2006-04-27cancelled 2018-06-26

All historical holders

Every license row we've seen with the callsign W6ZO, oldest first.

  • MELCHER, DONALD F CA
    1998-08-25 → cancelled 2004-06-19
  • SANDERS, PHILLIP L CA
    2016-05-24 → cancelled 2022-11-22
  • Zuill, Fred CA
    2024-12-13 → cancelled 2025-01-24
← Back to W6ZO License history →