When television networks were formed in the United States in the late 1940s and grew during the early 1950s, network-owned stations in New York City became the production centers for programs originating on the East Coast, feeding affiliates of ABC, CBS, and NBC in the eastern three-fourths of the country. Stations in Los Angeles similarly started producing programs on the West Coast, feeding affiliates in the Pacific Time Zone, Alaska and Hawaii. Consequently, the networks' New York City stations became known as the "East Coast flagships" of their respective networks and the networks' Los Angeles stations became known as the "West Coast flagships".