Cablevision Systems Corporation was an American cable television company with systems serving areas surrounding New York City. It was the fifth-largest cable provider and ninth-largest television provider in the United States. Throughout its existence and in its final years, Cablevision exclusively served customers residing in New York, New Jersey, Connecticut, and a small part of Pennsylvania. However, at one time it provided service in as many as 19 states. Cablevision also offered high-speed Internet connections, digital cable, and VoIP phone service through its Optimum brand name. Cablevision also offered a WiFi-only mobile phone service dubbed Freewheel.

Optimum is an American telecommunications brand owned and operated by Altice USA. It is the fourth largest cable provider in the United States and a Fortune 500 company. Optimum offers Internet, television, mobile and home phone serving in Arizona, Arkansas, California, Connecticut, Idaho, Kentucky, Louisiana, Mississippi, Missouri, New Jersey, Long Island and New York, North Carolina, Ohio, Oklahoma, Pennsylvania, Texas, and West Virginia.