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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

W4BTK callsign genealogy

Currently held by de Carvalho, Eduardo 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 W4BTK's current licensee, walking backwards.

  1. KM4VVYcancelled· T
    de Carvalho, Eduardo AVAgranted 2016-08-08cancelled 2020-01-24

Successor callsigns

Callsigns held now by people who previously held W4BTK.

  1. N4EACactive· G
    de Carvalho, Eduardo AVAgranted 2025-04-01
← Back to W4BTK License history →