Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W6TAO callsign genealogy
Currently held by WO RADIO CLUB
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 W6TAO's current licensee, walking backwards.
- KI7FRBcancelledWO RADIO CLUBWAgranted 2016-07-12cancelled 2016-08-12
Successor callsigns
Callsigns held now by people who previously held W6TAO.
- THOMPSEN, TODD RWAgranted 2010-02-09cancelled 2012-07-03
All historical holders
Every license row we've seen with the callsign W6TAO, oldest first.
- BROWN JR, WILLIAM C WA1999-03-11 → cancelled 2008-06-20
- THOMPSEN, TODD R WA2009-08-14 → cancelled 2010-02-09
- WO RADIO CLUB WA2016-08-12 active