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

AB4JO callsign genealogy

Currently held by Carvalho, Joseph J

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 AB4JO's current licensee, walking backwards.

  1. AB5JOcancelled· E
    Carvalho, Joseph JTXgranted 2008-10-15cancelled 2016-10-08
  2. KE5QZLcancelled· E
    Carvalho, Joseph JTXgranted 2005-09-23cancelled 2008-10-15
  3. KE4NOZcancelled· G
    Carvalho, Joseph JTXgranted 2005-09-23cancelled 2007-10-10

Successor callsigns

Callsigns held now by people who previously held AB4JO.

No current licensee on record previously held this callsign.

← Back to AB4JO License history →