United States Government--post Offies, Center Barnstead Nh Center Barnstead, NH 03225 Phone : (603) 269-4911 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Center Barnstead 55 S Barnstead Rd Center Barnstead, NH 03225 Phone : (603) 269-4911 Business Category Post Offices Toll-Free           (800) ASK-USPS