← Area code 815
815-704 phone numbers
Numbers 815-704-0000 to 815-704-9999 are assigned to Paetec Itel, LLC (rate centre SO BELOIT, IL, NANPA abbreviation). 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 815-704-3xxx, 815-704-4xxx, 815-704-5xxx, 815-704-6xxx, 815-704-8xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.