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

N4ZI callsign genealogy

Currently held by MADDOCK, WILLIAM C

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 N4ZI's current licensee, walking backwards.

  1. KQ4GWScancelled· E
    McGill, GaryFLgranted 2023-03-14cancelled 2024-11-30

Successor callsigns

Callsigns held now by people who previously held N4ZI.

  1. K4LIactive· E
    ROACH, JOSHUA RNCgranted 2022-11-11
  2. NX4Qactive· E
    Roberts, Phil CGAgranted 2020-09-05
  3. W4RTNcancelled· E
    MADDOCK, WILLIAM CTNgranted 2018-05-22cancelled 2018-12-29

All historical holders

Every license row we've seen with the callsign N4ZI, oldest first.

  • MADDOCK, WILLIAM C TN
    2016-10-19 → cancelled 2018-05-22
  • Roberts, Phil C GA
    2020-06-13 → cancelled 2020-09-05
  • ROACH, JOSHUA R NC
    2022-09-24 → cancelled 2022-11-11
  • McGill, Gary FL
    2024-11-30 active
← Back to N4ZI License history →