KØMBN OSCAR B MARTINSON 3507 ABBOTT AVE N MINNEAPOLIS, MN 55422-2323 United States Operator Class EXTRA Previous Callsign Grant Date 04/20/2016 Expire Date 07/17/2026 Codes HVIA - Vanity code - Former Primary Station Holder Ads from K0MBN on QTH.com Classifieds View Now! Put this form on your page! Enter a Callsign:   Courtesy of