Recently updated on December 1st, 2023 at 11:59 amADT Phone Numbers and Emails Customer service: 1 (800) 716-3640 ADT Sales: 1-888-323-3121 Monitoring: 1-888-238-2727 Sales: 1-866-746-7238 ADT Email: customercare@adt.com How to Contact ADT TOLL FREE 1-800
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