Governmental Offices-federal--civil Defense, Hecker Hecker, IL 62248 Phone : (618) 473-2922 Business Category Government Offices-Federal Government Offices & Public Schools United States Government--post Offices, Hecker Hecker, IL 62248 Phone : (618) 473-2922 Business Category Post Offices Government Offices & Public Schools Post Office - Hecker 140 W Monroe St Hecker, IL 62248 Phone : (618) 473-2922 Post Office - Hecker Business Category Post Offices Toll-Free           (800) ASK-USPS