Comcast SportsNet (CSN), also known under the corporate names NBC Sports Regional Networks or Comcast Sports Group, is the collective name for a group of regional sports networks in the United States that are primarily owned and operated by Comcast, and operated through the NBC Sports Group unit of NBCUniversal.Each of the networks carry regional broadcasts of sporting events from various professional, collegiate and high school sports teams (with broadcasts typically exclusive to each individual network, although some are shown on more than one CSN network within a particular team's designated market area), along with regional and national sports discussion, documentary and analysis programs.