Constant Guard : Comcast_SEC. Comcast Investor Relations. XFINITY® Voice from Comcast: Home Phone Service Provider, Landline Phone Service. Comcast Deals, Bundles, and Promotions on Comcast Internet and Cable. Comcast. Comcast Corporation, formerly registered as Comcast Holdings,[note 1] is the largest mass media and communications company in the world by revenue.[3] It is the largest cable company and home Internet service provider in the United States,[7] and the nation's third largest home telephone service provider.
Comcast services residential and commercial customers in 40 US states and the District of Columbia.[8] The company is headquartered in Philadelphia, Pennsylvania. As the owner of the international media company NBCUniversal since 2011,[9][10][11][12] Comcast is also a producer of film and television contents, operates cable channels (E! Comcast.net: Personal Web Pages. Entertainment. High Speed Internet, Cable TV, and Phone Services Deals – XFINITY® from Comcast.