NB may refer to:
The National Broadcasting Company (NBC) is an American English language commercial broadcast television network that is a flagship property of NBCUniversal, a subsidiary of Comcast.
NBC Sunday Night Football is a weekly television broadcast of National Football League (NFL) games on NBC in the United States.
NBCSN is an American digital cable and satellite television channel that is owned by the NBC Sports Group division of NBCUniversal.
NBC News is a division of the American broadcast network NBC. The division operates under NBCUniversal News Group, a subsidiary of NBCUniversal, in turn a subsidiary of Comcast.
NBC Sports is the programming division of the American broadcast network NBC, owned by the NBCUniversal Television Group division of NBCUniversal, that is responsible for sports broadcasts on the network, and its dedicated national sports cable channels.