917 Area Code: New York City, New York

The 917 area code covers all five boroughs of New York City, having been introduced as the city's first cross-borough overlay in the 1990s. The 917 designation was originally assigned primarily to mobile and pager numbers, though it has since taken on the same broad mix of voice numbers that the older borough-specific codes carry. New York City sits at the mouth of the Hudson, organized across five boroughs that span Manhattan's narrow island, the western end of Long Island (Brooklyn and Queens), the Bronx mainland, and Staten Island in the harbor.

In records the directory has compiled for 917 numbers, other New York cities — Albany, Binghamton, Brentwood, and Buffalo — recur frequently. None of those are inside the 917 footprint. The pattern reflects standard public-record dynamics, with phone numbers porting across New York and addresses linked across multiple cities. The directory currently documents 583 distinct prefixes within 917 in detail, a working subset of the prefix population the code carries.

New York City's population dominates the demographic story: the city sits among the largest in the world. Home values in the city run several times the US median, household income comes in slightly above the national reading citywide (with sharp variation by borough and neighborhood), and the median age sits close to the US figure. The 917 footprint shares those demographics with 212, 718, and the city's other overlay codes because they all serve the same broad five-borough geography in overlapping form.