| 231 | Michigan (Traverse City, Ludington, Muskegon, Petoskey and northwestern Michigan) More information at: Area Code 231 Phone Number Blocks |
| 248 | Michigan (Troy, Oakland County, Pontiac, Southfield, Rochester Hills and northwestern Detroit suburbs, overlays with 947) More information at: Area Code 248 Phone Number Blocks |
| 269 | Michigan (Battle Creek, Benton Harbor, Allegan, Hastings, Kalamazoo, St Joseph, and southwestern Michigan) More information at: Area Code 269 Phone Number Blocks |
| 313 | Michigan (Dearborn, Detroit and inner Detroit suburbs) More information at: Area Code 313 Phone Number Blocks |
| 517 | Michigan (Lansing, Jackson, Charlotte, Coldwater, Howell, Deerfield, Addison and south central Michigan) More information at: Area Code 517 Phone Number Blocks |
| 586 | Michigan (Warren, Sterling Heights and Macomb County, split from 810) More information at: Area Code 586 Phone Number Blocks |
| 616 | Michigan (Grand Rapids, Holland, Greenville, Grand Haven, Zeeland, Ionia and southwestern Michigan) More information at: Area Code 616 Phone Number Blocks |
| 679 | Michigan This Area code is scheduled to provide numbering relief to Area code 313 but no date has been assigned for this to go into effect. More information at: Area Code 679 Phone Number Blocks |
| 734 | Michigan (Ann Arbor, Canton, Plymouth, Monroe, Wayne, Ypsilanti, Romulus and southwestern Detroit suburbs) More information at: Area Code 734 Phone Number Blocks |
| 810 | Michigan (Port Huron, Flint, Lapeer, and Michigan "Thumb", (originally split from 313 and included areas that later became 248 and 586) More information at: Area Code 810 Phone Number Blocks |
| 906 | Michigan (Upper Peninsula) More information at: Area Code 906 Phone Number Blocks |
| 947 | Michigan (Troy, Oakland County, Pontiac, Southfield, Rochester Hills and northwestern Detroit suburbs, overlays with 248) More information at: Area Code 947 Phone Number Blocks |
| 989 | Michigan (Alpena, Mt. Pleasant, Bay City, Saginaw, Midland, Owosso and central Michigan) More information at: Area Code 989 Phone Number Blocks |
