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

W9USB callsign genealogy

Currently held by WARNER, DOUGLAS C

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 W9USB's current licensee, walking backwards.

  1. KI9Factive· E
    Walker, Kenneth RKYgranted 2021-02-13
  2. WX4YYcancelled· E
    Walker, Kenneth RKYgranted 2021-01-26cancelled 2021-02-13
  3. WT2Yactive· E
    Downie, Robert DNCgranted 2021-12-18
  4. KJ4QIVcancelled· E
    Downie, Robert DFLgranted 2009-11-13cancelled 2012-02-28

Successor callsigns

Callsigns held now by people who previously held W9USB.

  1. N9NXcancelled· E
    WARNER, DOUGLAS CWIgranted 2006-01-10cancelled 2009-02-03

All historical holders

Every license row we've seen with the callsign W9USB, oldest first.

  • WARNER, DOUGLAS C WI
    2004-03-16 → cancelled 2006-01-10
  • Ison, Clay IN
    2018-12-28 active
← Back to W9USB License history →