Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WS7O callsign genealogy
Currently held by Friebele, Steven E
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 WS7O's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WS7O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WS7O, oldest first.
- HOLM, STANLEY H OR2008-05-31 → cancelled 2020-08-28
- Friebele, Steven E AZ2020-09-15 active