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

WB4JRT callsign genealogy

Currently held by THOMPSON, JOHN R

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 WB4JRT's current licensee, walking backwards.

  1. K7JRTactive· E
    Trott, James RWAgranted 2017-02-04
  2. KI7JAYactive· T
    Biggs, Jay AWAgranted 2020-12-29
  3. KJ7SWNcancelled· T
    Biggs, Jay AWAgranted 2020-12-10cancelled 2020-12-29

Successor callsigns

Callsigns held now by people who previously held WB4JRT.

  1. W4JRTactive· E
    Thompson, John RFLgranted 2020-11-20
← Back to WB4JRT License history →