Comcast Business Class, the largest cable operator and third-largest telephone company in America, provides broadband internet (Coax and Metro Ethernet), telephone service (POTS and PRI), and cable television to businesses in 19 markets nationwide, covering 39 states. Comcast Business Class, who manages their own network end-to-end, does not share any physical facilities with the phone companies and makes a great primary or backup connection for your SMB and enterprise customers.