W4DHX John B Mauro 7977 124 Terrace N Largo, FL 33773 United States Operator Class EXTRA Previous Callsign Grant Date 10/06/2018 Expire Date 12/16/2028 Codes HVIE - Vanity code - Primary Station Preference List Ads from W4DHX on QTH.com Classifieds View Now! Put this form on your page! Enter a Callsign:   Courtesy of