North Dakota State Of--national Guard, Mayville Armory, Det2 Co A 142nd Ecb 332 Center Ave S Mayville, ND 58257 Phone : (701) 786-3341 Business Category Government Offices-State Government Offices State & Local National Security Government Offices & Public Schools Us National Guard 332 Center Ave S Mayville, ND 58257 Phone : (701) 786-3341 Business Category Government Offices-Federal Government Offices-State Government Offices State & Local National Security Government Offices & Public Schools