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

AB5JO 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 AB5JO's current licensee, walking backwards.

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

Successor callsigns

Callsigns held now by people who previously held AB5JO.

  1. AB4JOactive· E
    Carvalho, Joseph JFLgranted 2026-08-12

All historical holders

Every license row we've seen with the callsign AB5JO, oldest first.

  • JANSEN, DONALD T TX
    1992-12-22 → cancelled 2004-12-23
  • Carvalho, Joseph J TX
    2008-10-15 → cancelled 2016-10-08
← Back to AB5JO License history →