Area code 989 is the area code for northeastern Michigan. It is the highest possible number for an area code,[1] since any number with a 9 in the middle is not allowed to be an area code. It was made in 2001.
- ↑ "Geographic NPAs In Service Sorted by Number". North American Numbering Plan Administrator. Archived from the original on 2019-05-25. Retrieved 2019-05-25.