← Area code 989
989-678 phone numbers
Numbers 989-678-0000 to 989-678-9999 are assigned to Michigan Bell Tel Co in Owendale, MI. 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 989-678-0xxx, 989-678-2xxx, 989-678-3xxx, 989-678-5xxx, 989-678-6xxx, 989-678-8xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.