Passport Application Services - Gravois 4455 Ridgewood Ave Saint Louis, MO 63116 Phone : (314) 481-0784 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Post Office - Gravois 4455 Ridgewood Ave Saint Louis, MO 63116 Phone : (314) 481-0784 Business Category Post Offices Toll-Free           (800) ASK-USPS