← Area code 646
646-704 phone numbers
Numbers 646-704-0000 to 646-704-9999 are assigned to New Cingular Wireless PCS, LLC (rate centre NWYRCYZN01, NY, NANPA abbreviation). 6 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.