Passport Application Services - Littleton 134 Main St Ste 100 Littleton, NH 03561 Phone : (603) 444-7787 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Fax           (603) 444-9956 Post Office - Littleton 134 Main St Ste 100 Littleton, NH 03561 Phone : (603) 444-7787 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (603) 444-9956