Hours Of Operations ADT Maryland Rock Hall ADT Hours of Operation and Locations in Rock Hall, MD 4.7 - 140 votes 1 Locations in Rock Hall www.adt.com ADT Hours Category: Home & Garden ADT - Rock Hall, MD 21661 (410) 639-0056 View Store Details Explore Rock HallView More Apparel Dots Sports ColemanWest Marine 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