679 Area Code
Area code 679 serves Detroit in Michigan. It has been in service since November 7, 2025, when it was split from 313.
Cities and towns in area code 679
Got a call from 679?
A 679 number was originally issued in Michigan, but that does not prove the caller is there. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.
Questions about area code 679
- Where is area code 679?
- Area code 679 is in Michigan. It covers Detroit.
- What time zone is area code 679?
- Area code 679 is in the Eastern time zone.
- Is 679 a toll-free number?
- No. 679 is a geographic area code in Michigan. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
- Why does 679 share its area with 313?
- 313 and 679 form an overlay: they cover the same territory, so new numbers there can get any of these codes, and local calls need all 10 digits.
- Will area code 679 run out of numbers?
- NANPA's latest forecast projects the 313/679 overlay to exhaust in the second quarter of 2091. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.