Central Office Locations

Section 850 Section 850.215  Central Office Locations a)         Concordia Complex 1301 Concordia Court P. O. Box 19277 Springfield, Illinois  62794-9277 Telephone:  217/522-2666 b)         State of Illinois Center 100 West Randolph St., Suite 4-200 Chicago, Illinois  60601-3219 Telephone: 312/814-3017 c)         Joliet Complex 1125 So. Collins St. P. O. Box 515 Joliet, Illinois 60432 Telephone: 217/727-6141