WP4O PEDRO J OTERO RPTO. VALENCIA O-28 CALLE A BAYAMON, PR 00959-4128 United States Operator Class EXTRA Previous Callsign Grant Date 02/21/2026 Expire Date 05/13/2036 Codes HVIE - Vanity code - Primary Station Preference List Ads from WP4O on QTH.com Classifieds View Now! Put this form on your page! Enter a Callsign:   Courtesy of