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

W4ESA callsign genealogy

Currently held by ESCUDERO, SERGIO A

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 W4ESA's current licensee, walking backwards.

  1. KE4GWNcancelled· G
    ESCUDERO, SERGIO AFLgranted 2003-10-09cancelled 2007-10-05
  2. KE4AEH
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held W4ESA.

  1. N3MZactive· E
    ESCUDERO, SERGIO AFLgranted 2018-06-01
← Back to W4ESA License history →