Hours Of Operations ADT Illinois Mt Sterling ADT Hours of Operation and Locations in Mt Sterling, IL 4.7 - 140 votes 1 Locations in Mt Sterling www.adt.com ADT Hours Category: Home & Garden ADT - Mt Sterling, IL 62353 (866) 645-2397 View Store Details Explore Mt SterlingView More Apparel CarharttDots 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