← Area code 231
231-341 phone numbers
Numbers 231-341-0000 to 231-341-9999 are assigned to New Cingular Wireless PCS, LLC in Lake Ann, MI. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 231-341-1xxx, 231-341-2xxx, 231-341-3xxx, 231-341-4xxx, 231-341-5xxx, 231-341-6xxx, 231-341-7xxx, 231-341-8xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.