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

WO6K callsign genealogy

Currently held by Killingsworth, Stephen L

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 WO6K's current licensee, walking backwards.

  1. W9SDRactive· G
    KITZMAN, HILARY ANMgranted 2022-02-11
  2. KT5HILcancelled· G
    KITZMAN, HILARY ANMgranted 2019-04-23cancelled 2022-02-11
  3. KF5ATHcancelled· T
    RUSHNELL, HILARY ATXgranted 2009-04-27cancelled 2009-05-23

Successor callsigns

Callsigns held now by people who previously held WO6K.

  1. W4EXIcancelled· E
    Killingsworth, Stephen LFLgranted 2017-12-22cancelled 2018-05-08

All historical holders

Every license row we've seen with the callsign WO6K, oldest first.

  • RASMUSSEN, PAUL R CA
    2005-08-09 → cancelled 2017-10-24
  • Killingsworth, Stephen L FL
    2017-11-14 → cancelled 2017-12-22
  • Robinson, Scott D CA
    2020-01-10 active
← Back to WO6K License history →