← Area code 989
989-431 phone numbers
Numbers 989-431-0000 to 989-431-9999 are assigned to Omnipoint Communications Midwest Operations, LLC in Cass City, MI. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 989-431-0xxx, 989-431-1xxx, 989-431-2xxx, 989-431-5xxx, 989-431-6xxx, 989-431-7xxx, 989-431-8xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.