Area code 917 is a telephone area code in the North American Numbering Plan for the entirety of New York City. It is an overlay code to all numbering plan areas (NPAs) in the city, and was intended to serve cellular, pager, and voicemail applications in the city. The restriction was subsequently ruled impermissible by the Federal Communications Commission (FCC) which grandfathered that use in New York City. Area code 917 is also assigned to landlines predominantly in Manhattan, to relieve the shortage of numbers there.