Area coe 347 is a New York City area code used as an overlay to area code 718 and area code 917. It is used in the boroughs of Brooklyn, Queens, the Bronx and Staten Island in New York City, as well as the Marble Hill and Inwood sections of Manhattan. 347 is used for landline, cell phones/pagers/mobile devices, but all of the other area codes in the city can be used for such services.