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← Area code 231

231-688 phone numbers

Numbers 231-688-0000 to 231-688-9999 are assigned to Fractel, LLC (rate centre MERRITT, MI, NANPA abbreviation). 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 231-688-0xxx, 231-688-2xxx, 231-688-3xxx, 231-688-4xxx, 231-688-5xxx, 231-688-7xxx, 231-688-9xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 231-688