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

NC4OI callsign genealogy

Currently held by MUTRO, ANTHONY D

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 NC4OI's current licensee, walking backwards.

  1. NY4Vactive· E
    Mueller, RalfORgranted 2016-12-28
  2. AC9GXcancelled· E
    Mueller, RalfNVgranted 2013-11-20cancelled 2016-12-28

Successor callsigns

Callsigns held now by people who previously held NC4OI.

  1. AL5Tcancelled· E
    MUTRO, ANTHONY DAKgranted 2015-07-28cancelled 2016-01-09
← Back to NC4OI License history →