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

WA0O callsign genealogy

Currently held by SAWHILL, 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 WA0O's current licensee, walking backwards.

  1. KC0CCcancelled· E
    Wussler IV, Henry JMOgranted 2018-05-19cancelled 2021-11-19
  2. KC0SDUcancelled· E
    Wussler IV, Henry JMOgranted 2014-01-23cancelled 2018-05-19

Successor callsigns

Callsigns held now by people who previously held WA0O.

  1. KC0Iactive· E
    Webb, Russell LMOgranted 2019-10-25

All historical holders

Every license row we've seen with the callsign WA0O, oldest first.

  • SAWHILL, JOHN R IA
    2007-05-21 → cancelled 2019-08-20
  • Webb, Russell L MO
    2019-09-06 → cancelled 2019-10-25
  • Wussler IV, Henry J MO
    2021-11-19 active
← Back to WA0O License history →