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

N4USI callsign genealogy

Currently held by AO-27 Control OPerator Assoc.

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 N4USI's current licensee, walking backwards.

  1. KI4EECcancelled
    AO-27 Control OPerator Assoc.VAgranted 2004-02-23cancelled 2004-03-16

Successor callsigns

Callsigns held now by people who previously held N4USI.

  1. N3UCactive· E
    Wyrick, Michael JVAgranted 2022-01-11

All historical holders

Every license row we've seen with the callsign N4USI, oldest first.

  • Wyrick, Michael J VA
    2001-11-14 → cancelled 2002-03-21
  • AO-27 Control OPerator Assoc. VA
    2024-10-25 active
← Back to N4USI License history →