Mediacom - Residential Services Internet, Cable & Fiber Optics Mediacom - Residential Services Visit Website Request Info 32441 Royal Blvd. Dagsboro, DE 19939 (800) 239-8411 (302) 732-6616 (fax) About Map About Serving the cable, internet and phone service needs of lower Delaware and Maryland homes. What's Nearby? Distance: 5 10 15 20 25 50 mi.