Passport Application Services - Finksburg 2999 Dede Rd Finksburg, MD 21048 Phone : (410) 526-0420 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Fax           (410) 526-0636 Post Office - Finksburg 2999 Dede Rd Finksburg, MD 21048 Phone : (410) 526-0420 Post Office - Finksburg Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (410) 526-0636