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

W5SEA callsign genealogy

Currently held by Brown, Joseph 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 W5SEA's current licensee, walking backwards.

  1. KJ6MORcancelled· E
    Sugiyama, TaichiCAgranted 2011-02-11cancelled 2012-01-07

Successor callsigns

Callsigns held now by people who previously held W5SEA.

  1. K9HROcancelled· T
    Brown, Joseph DTXgranted 2009-12-19cancelled 2010-03-06
  2. KE5QENcancelled· T
    Brown, Joseph DTXgranted 2007-03-27cancelled 2007-09-22

All historical holders

Every license row we've seen with the callsign W5SEA, oldest first.

  • Brown, Joseph D TX
    2007-03-27 → cancelled 2007-08-23
  • Brown, Joseph D TX
    2007-09-22 → cancelled 2009-12-19
  • Sugiyama, Taichi CA
    2021-11-03 active
← Back to W5SEA License history →