Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WK7S callsign genealogy
Currently held by Yuma Arizona Contest 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 WK7S's current licensee, walking backwards.
- KF7VCEcancelledYuma Arizona Contest ClubAZgranted 2012-04-02cancelled 2012-07-10
Successor callsigns
Callsigns held now by people who previously held WK7S.
- Rakos, David EIDgranted 2020-03-24
All historical holders
Every license row we've seen with the callsign WK7S, oldest first.
- WASHBURN, JOHN R NV1997-10-23 → cancelled 2009-10-24
- Rakos, David E ID2009-11-14 → cancelled 2010-06-19
- Yuma Arizona Contest Club AZ2023-01-19 active