A new 10-digit dialing requirement begins Nov. 7, when the 679 area code will officially overlap with what is now solely a 313 district. The Michigan Public Service Commission said in its ...

DETROIT (WXYZ) — The city of Detroit and its surrounding areas with a 313 area code will be switching to a 10-digit dialing requirement and a new overlay area code ...

The change comes as part of an effort to address the dwindling supply of available phone numbers under the 313 area code, the Michigan Public Service Commission (MPSC) said in a Monday news release.