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← Area code 331

331-208 phone numbers

Numbers 331-208-0000 to 331-208-9999 are assigned to Level 3 Communications, LLC in Aurora, IL. 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 331-208-0xxx, 331-208-1xxx, 331-208-2xxx — calls from these use spoofed caller IDs.

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 331-208