Canadial Know Who Called
← Area code 231

231-324 phone numbers

Numbers 231-324-0000 to 231-324-9999 are assigned to Teleport Communications America, LLC (rate centre HARBOR SPG, MI, NANPA abbreviation). 8 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 231-324-2xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 231-324