Comcast Corporation, formerly known as American Cable Systems and then Comcast Holdings, is a multinational telecommunications and media conglomerate incorporated and headquartered in Philadelphia. It is the fourth-largest broadcasting and cable television company worldwide by revenue. It is the third-largest pay-TV company, the second-largest cable TV company by subscribers, and the largest home Internet service provider in the United States. In 2023, the company was ranked 51st in the Forbes Global 2000. Comcast is additionally the nation's third-largest home telephone service provider. It provides services to U.S. residential and commercial customers in 40 states and the District of Columbia. As the owner of NBCUniversal since 2011, Comcast is also a high-volume producer of films for theatrical exhibition and television programming, and a theme park operator. It is the fourth-largest telecommunications company by worldwide revenue. Comcast owns and operates the Xfinity residential cable communications business segment and division; Comcast Business, a commercial services provider; and Xfinity Mobile, an MVNO of Verizon. Wikipedia