Hours Of Operations ADT Colorado Sterling ADT Hours of Operation and Locations in Sterling, CO 4.7 - 140 votes 2 Locations in Sterling www.adt.com ADT Hours Category: Home & Garden ADT - Sterling, CO 80751 (877) 244-1255 View Store Details ADT - Sterling, CO 80751 (888) 238-5258 View Store Details Explore SterlingView More Apparel CarharttBeallsJCPenneyRainbowNew York & Company Sports Vans Jewelry Bealls 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