Passport Application Services - Davidsonville 820 W Central Ave Davidsonville, MD 21035 Phone : (410) 956-8352 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Fax           (443) 203-0285 Post Office - Davidsonville 820 W Central Ave Davidsonville, MD 21035 Phone : (410) 956-8352 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (443) 203-0285