Residents in Michigan's 313 area code will switch to 10-digit dialing
If you currently dial seven digits for a local call in the Detroit area, get ready to include the 313 area code.
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10-digit dialing for Michigan’s 313 area code begins this year -- what to know
People with 313 area codes will have to start dialing 10 digits for all local calls. The change takes effect later this fall.
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New 679 area code begins in November for Detroit & other areas; 10-digit dialing to be required
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 starting later this year.