← Area code 231
231-862 phone numbers
Numbers 231-862-0000 to 231-862-9999 are assigned to Ace Tel. Co. of Michigan, Inc. (rate centre HOXEYVILLE, MI, NANPA abbreviation). 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 231-862-5xxx, 231-862-6xxx, 231-862-7xxx, 231-862-8xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.