Passport Application Services - Mccomb 530 Delaware Ave Mccomb, MS 39648 Phone : (601) 684-1931 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Fax           (601) 684-4526 Post Office - Mccomb 530 Delaware Ave Mccomb, MS 39648 Phone : (601) 684-1931 Business Category Post Offices Government Offices & Public Schools Toll-Free           (800) ASK-USPS Fax           (601) 684-4526