Hours Of Operations ADT Illinois Belvidere ADT Hours of Operation and Locations in Belvidere, IL 4.7 - 140 votes 1 Locations in Belvidere www.adt.com ADT Hours Category: Home & Garden ADT - Belvidere, IL 61008 411 S State St(815) 844-0278 View Store Details Explore BelvidereView More Apparel KmartH & MCarharttCoachDeb Sports Sports Time Recommend For You Stacy Furniture Build-A Bear Workshop J. C. Penney 84 Lumber A.C. Moore Arts & Crafts Adams Golf American Standard American TV & Appliance Andersen Windows & Doors Andronico's Market