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

K1TRS callsign genealogy

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 K1TRS's current licensee, walking backwards.

  1. KC1UPNcancelled· G
    Vigeant, MatthewMAgranted 2024-04-13cancelled 2024-05-03

Successor callsigns

Callsigns held now by people who previously held K1TRS.

  1. K1WYactive· E
    YOREO, WILLIAM ACTgranted 2018-02-02
  2. K8RFXactive· G
    Liveoak, ROBERT JMIgranted 2017-03-07

All historical holders

Every license row we've seen with the callsign K1TRS, oldest first.

  • LIVEOAK, ROBERT J MI
    2016-05-06 → cancelled 2017-03-07
  • Vigeant, Matthew MA
    2024-05-03 active
  • —
    — → cancelled 1998-04-03
← Back to K1TRS License history →