← Area code 803
803-523 phone numbers
Numbers 803-523-0000 to 803-523-9999 are assigned to New Cingular Wireless PCS, LLC in Fort Lawn, SC. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 803-523-1xxx, 803-523-2xxx, 803-523-3xxx, 803-523-4xxx, 803-523-6xxx, 803-523-7xxx, 803-523-8xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.