← Area code 773
773-613 phone numbers
Numbers 773-613-0000 to 773-613-9999 are assigned to New Cingular Wireless PCS, LLC (rate centre CHICGOZN01, IL, NANPA abbreviation).
Not assigned to any carrier: 773-613-0xxx, 773-613-1xxx, 773-613-2xxx, 773-613-3xxx, 773-613-4xxx, 773-613-5xxx, 773-613-6xxx, 773-613-7xxx, 773-613-8xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.