← Area code 631
631-577 phone numbers
Numbers 631-577-0000 to 631-577-9999 are assigned to Verizon New York, Inc. (rate centre FARMINGDL, NY, NANPA abbreviation).
Not assigned to any carrier: 631-577-8xxx, 631-577-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.