NB1U MARK A JOHNSEN 9808 Cattail Ct Fort Myers, FL 33905-5107 United States Operator Class EXTRA Previous Callsign Grant Date 03/10/2023 Expire Date 10/21/2028 Codes HAI - Ham Radio - Individual Ads from NB1U on QTH.com Classifieds View Now! Put this form on your page! Enter a Callsign:   Courtesy of