Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0SKI callsign genealogy
Currently held by CLARKSON, FREDRICH A
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 W0SKI's current licensee, walking backwards.
- CLARKSON, FREDRICH AAZgranted 2006-11-07cancelled 2011-04-15
Successor callsigns
Callsigns held now by people who previously held W0SKI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0SKI, oldest first.
- Stone, James R CA1998-03-17 → cancelled 2010-03-18
- CLARKSON, FREDRICH A AZ2021-01-26 active