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

W9TRW callsign genealogy

Currently held by Wamser, Thomas 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 W9TRW's current licensee, walking backwards.

  1. AB9YRcancelled· E
    Wamser, Thomas RWIgranted 2011-01-10cancelled 2011-03-22
  2. KC9TMLcancelled· E
    Wamser, Thomas RWIgranted 2011-01-10cancelled 2011-03-02

Successor callsigns

Callsigns held now by people who previously held W9TRW.

  1. KB9KXactive· A
    WHITE, THOMAS RILgranted 2021-02-09

All historical holders

Every license row we've seen with the callsign W9TRW, oldest first.

  • WHITE, THOMAS R IL
    1999-07-15 → cancelled 2001-04-27
  • Wamser, Thomas R WI
    2021-03-05 active
← Back to W9TRW License history →