← Area code 336
336-304 phone numbers
Numbers 336-304-0000 to 336-304-9999 are assigned to Charter Ip Enabled Services, LLC (rate centre BOOMER, NC, NANPA abbreviation). 4 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 336-304-1xxx, 336-304-2xxx, 336-304-3xxx, 336-304-4xxx, 336-304-7xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.