Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3SUD callsign genealogy
Currently held by Cooper, Shawn M
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 W3SUD's current licensee, walking backwards.
- Cooper, Shawn MPAgranted 2002-08-15cancelled 2004-04-13
Successor callsigns
Callsigns held now by people who previously held W3SUD.
- Cooper, Shawn MWVgranted 2025-09-17