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← Area code 336

336-600 phone numbers

Numbers 336-600-0000 to 336-600-9999 are assigned to Level 3 Communications, LLC (rate centre OLDTOWN, NC, NANPA abbreviation). 8 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.

Reported numbers in 336-600