← Area code 313
313-309 phone numbers
Numbers 313-309-0000 to 313-309-9999 are assigned to Paetec Itel, LLC (rate centre DETROITZN1, MI, NANPA abbreviation). 1 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.