From the NY Times:
It’s getting to the point where 718 seems like a vintage number. New York City, which already has five area codes, will need another, soon. That much is clear.
The only question — according to a new report by the state’s Department of Public Service, which regulates the telecommunications industry — is whether to create a new area code just for Brooklyn, Queens, the Bronx and Staten Island (which are served by the existing 718 and 347 area codes) or to also encompass Manhattan (which uses the 212 and 646 area codes) and the 917 area code, which is the only code used across all five boroughs.
The unrelenting proliferation of phone numbers — brought about, above all, by the widespread use of cellphones, smartphones and other mobile devices — means that assignable phone numbers for the 718 and 347 area codes will run out by late 2011, according to the paper.