← Area code 231
231-793 phone numbers
Numbers 231-793-0000 to 231-793-9999 are assigned to AT&T Enterprises, LLC in White Cloud, MI. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 231-793-0xxx, 231-793-1xxx, 231-793-2xxx, 231-793-4xxx, 231-793-5xxx, 231-793-7xxx, 231-793-8xxx, 231-793-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.