Comcast Corporation is a major American telecommunications company headquartered in Philadelphia, Pennsylvania. Founded in 1963, it is one of the largest providers of cable television, internet, and phone services in the United States. Comcast operates under various brands, including Xfinity, which offers high-speed internet and digital TV services. In addition to its telecommunications services, Comcast owns NBCUniversal, a significant player in the entertainment industry. This subsidiary produces films, television shows, and operates theme parks. Comcast's diverse portfolio allows it to reach millions of customers across the country, making it a key player in both media and technology sectors.