231-583 phone numbers

Numbers 231-583-0000 to 231-583-9999 are assigned to 123.net, LLC in Ludington, MI.

Not assigned to any carrier: 231-583-2xxx, 231-583-3xxx, 231-583-4xxx, 231-583-5xxx, 231-583-6xxx, 231-583-7xxx, 231-583-8xxx, 231-583-9xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 231-583