U S Government--postal Service, Post Office Erie, ND 58029 Phone : (701) 668-2406 Business Category Post Offices Government Offices & Public Schools Post Office - Ayr 205 Main Ayr, ND 58007 Phone : (701) 668-2406 Business Category Post Offices Toll-Free           (800) ASK-USPS Post Office - Erie 406 Main Ave Erie, ND 58029 Phone : (701) 668-2406 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (605) 357-4906