231-371 phone numbers

Numbers 231-371-0000 to 231-371-9999 are assigned to Bandwidth.com CLEC, LLC in Tustin, MI. 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 231-371-3xxx, 231-371-4xxx, 231-371-5xxx, 231-371-6xxx, 231-371-8xxx, 231-371-9xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 231-371