Passport Application Services - Mazon 600 Depot St Mazon, IL 60444 Phone : (815) 448-5697 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Post Office - Mazon 600 Depot St Mazon, IL 60444 Phone : (815) 448-5697 Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--postal Service, Mazon 600 Depot St Mazon, IL 60444 Phone : (815) 448-5697 Business Category Government Offices-Federal Government Offices & Public Schools