Last updated on June 26th, 2019 at 06:03 amMediacom Customer Service Phone Numbers Customer service: 1-855-633-4226 Call Now Today: 1-855-592-3334 Mediacom Business Technical Support Phone Number: 1-800-379-7412 Mediacom Business Service Phone Number: 1-800-479-2070 Home Controller Support Phone Number: 1-877-900-3495 Mediacom Closed Captioning Support Phone Number: 1-877-847-6221 Order DirectTV:1-888-777-2454 Sales Call: 1-929-376-0728 Fax Number: (845) 698-4069 Mediacom