Passport Application Services - Simpsonville 10400 Shaker Dr Simpsonville, MD 21150 Phone : (410) 772-0194 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Fax           (410) 347-4289 Post Office - Simpsonville 10400 Shaker Dr Simpsonville, MD 21150 Phone : (410) 772-0194 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (410) 347-4289