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

KB4MRC callsign genealogy

Currently held by Chaves, Matthew

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 KB4MRC's current licensee, walking backwards.

  1. KC1GJIcancelled· G
    Chaves, MatthewMAgranted 2017-05-16cancelled 2017-05-16
  2. KC1GGFcancelled· G
    Chaves, MatthewMAgranted 2007-07-24cancelled 2016-09-27
  3. W1CKYactive· G
    Brown, Matthew EMEgranted 2026-03-20
  4. KW1CKYcancelled· G
    Brown, Matthew EMEgranted 2022-11-29cancelled 2026-03-20
  5. KC1SAXcancelled· T
    Brown, Matthew EMEgranted 2022-11-09cancelled 2022-11-29

Successor callsigns

Callsigns held now by people who previously held KB4MRC.

  1. W1CKYcancelled· G
    Chaves, MatthewMAgranted 2017-11-04cancelled 2025-12-09
← Back to KB4MRC License history →