NBC Sports Boston is the Boston Celtics' main television outlet, having aired its games since 1981 when the station was known as PRISM New England. In 1983, it rebranded as SportsChannel New England. Like all the other SportsChannel networks, the New England channel was rebranded as Fox Sports New England when former owner Cablevision entered into a partnership with Liberty Media and News Corporation in 1998. Comcast purchased Cablevision's original network stake in 2001, then acquired the remaining stake in what was now FSN New England in 2007 and rebranded the network as Comcast SportsNet New England. In 2017, all CSN networks (including CSN New England) were renamed as NBC Sports Regional Networks in reference to Comcast's current ownership of NBCUniversal.