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.
The network is headquartered at 30 Rockefeller Plaza in New York City, with additional major offices near Los Angeles (at 10 Universal City Plaza), and Chicago (at the NBC Tower).
In the 1930s, NBC also developed a network for shortwave radio stations, called the NBC White Network.
In 1927, NBC moved its operations to 711 Fifth Avenue in Manhattan, occupying the upper floors of a building designed by architect Floyd Brown.
This station was transferred from Westinghouse to RCA in 1923, and moved to New York City.