Comcast Corporation, once known as Comcast Holdings, is a United States-based global telecommunications company that is the biggest cable television and broadcasting company in the world, going off of revenue. Comcast is the second-largest pay-TV organization following the AT&T-DirecTV acquirement, the biggest home internet service provider and cable television provider in America. It is also the country's biggest home telephone service provides. It services both commercial and residential companies in over 40 states and the District of Columbia, and is headquartered in Philadelphia, Pennsylvania. They produce films and TV shows as well as cable television and over-the-air broadcasting.