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

AG4YC callsign genealogy

Currently held by Castaldo, John N

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 AG4YC's current licensee, walking backwards.

  1. KG6FLEcancelled· E
    Castaldo, John NSCgranted 1994-12-29cancelled 2003-02-12
  2. KE6PNUcancelled· G
    Castaldo, John NCAgranted 1994-12-29cancelled 2001-03-07
  3. N9EQB
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held AG4YC.

  1. W9ZUactive· E
    Castaldo, John NSCgranted 2021-07-01
← Back to AG4YC License history →