Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0SDW callsign genealogy
Currently held by Wolterstorff, Steve D
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 W0SDW's current licensee, walking backwards.
- Wolterstorff, Steve DSDgranted 2004-03-18cancelled 2005-09-07
Successor callsigns
Callsigns held now by people who previously held W0SDW.
No current licensee on record previously held this callsign.