KF4R ROBERT G DU PONT 6510 US ONE S ST AUGUSTINE, FL 32086 United States Operator Class EXTRA Previous Callsign Grant Date 11/30/2018 Expire Date 02/26/2029 Codes HVIE - Vanity code - Primary Station Preference List Ads from KF4R on QTH.com Classifieds View Now! Put this form on your page! Enter a Callsign:   Courtesy of