Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9SD callsign genealogy
Currently held by Schlaugat Jr, Walter C
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 W9SD's current licensee, walking backwards.
- KC9RJMcancelledSchlaugat DXers Radio SocietyWIgranted 2010-02-08cancelled 2010-03-09
Successor callsigns
Callsigns held now by people who previously held W9SD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9SD, oldest first.
- Schlaugat Jr, Walter C WI2006-11-02 → cancelled 2009-02-27
- Schlaugat DXers Radio Society WI2019-12-24 active