N1TKO GERALD D COLTON 120 WEST ROCHAMBAULT ST HAVERHILL, MA 01832 United States Operator Class GENERAL Previous Callsign Grant Date 09/30/2016 Expire Date 12/29/2026 Codes HVIE - Vanity code - Primary Station Preference List Ads from N1TKO on QTH.com Classifieds View Now! Put this form on your page! Enter a Callsign:   Courtesy of