The company's operational center is located at Cablevision's former headquarters in Bethpage, Nassau County, New York, on Long Island.

With its combined brands, Altice USA is the fourth-largest cable provider in the U.S.,[3] serving customers residing in the New York metropolitan area as well as in several Midwestern and Southern U.S.

In November 2016, Altice USA announced a five-year plan for fiber-to-the-home service to build a network capable of delivering 10 Gbit/s broadband speed.

[19] On September 17, 2015, Altice NV announced its intention to acquire Cablevision from the Dolan family and other public shareholders for $17.7 billion.

[25] On February 14, 2020, Altice USA announced that it has bought Service Electric Broadband Cable in New Jersey.

[28] On March 1, 2021, Altice USA announced that it would acquire Morris Broadband in North Carolina for $310 million which was later closed on April 6, 2021.

[29][30] The company provides service in 22 states:[31][32] Altice engaged in a carriage dispute with the Dolan family (the former owners of Cablevision).