NB, Nb, or nb may refer to:
The National Broadcasting Company (NBC) is an American English-language commercial terrestrial television network that is a flagship property of NBCUniversal, a subsidiary of Comcast.
NBCSN is an American pay television channel that is owned by the NBC Sports Group division of NBCUniversal.
NBC News is the news division of the American broadcast television network NBC. The division operates under NBCUniversal Broadcast, Cable, Sports and News, a subsidiary of NBCUniversal, in turn a subsidiary of Comcast.