KP4MF Felix A Mendez-Alvarado Urb Las Campinas 2 71 Amistad St Las Piedras, PR 00771 United States Operator Class EXTRA Previous Callsign Grant Date 05/10/2022 Expire Date 05/25/2032 Codes HVIE - Vanity code - Primary Station Preference List Ads from KP4MF on QTH.com Classifieds View Now! Put this form on your page! Enter a Callsign:   Courtesy of