The area code 646 is located in New York City, New York.
Area code 646 serves the borough of Manhattan in New York City, New York, as an overlay to 212 and 332. It covers Manhattan’s neighborhoods and business centers, including Roosevelt Island, and requires 10-digit dialing across NYC due to multiple overlays. Established in 1999, 646 helped meet demand as 212 numbers ran out, while 917 overlays the entire city for both mobile and landline service. This is a standard geographic area code within the North American Numbering Plan, not tied to any special service.
Landmarks and neighborhoods within the 646 service area include:
An interesting note: while Marble Hill is part of the borough of Manhattan, its phone service routes through the Bronx, so it uses 718/347/929 instead of 646/212/332. Many longtime New Yorkers view 212 as a “prestige” code, but 646 is just as local to Manhattan and widely used by residents, startups, and major companies. If you see a 646 phone number, it typically signals a Manhattan-based line, whether mobile or landline, spanning everything from Midtown offices to downtown creative spaces. Together, 212, 646, 332, and 917 ensure ample numbering capacity for one of the most densely connected areas in the country.
Year introduced: 1999 (North American Numbering Plan Administrator)