W4DS Kostadinos G Vasilopoulos 10264 Estuary Dr, PO BOX 33647 Tampa, FL 33647 United States Operator Class EXTRA Previous Callsign Grant Date 06/13/2025 Expire Date 06/06/2035 Codes HVIE - Vanity code - Primary Station Preference List Ads from W4DS on QTH.com Classifieds View Now! Put this form on your page! Enter a Callsign:   Courtesy of