679 area code — Michigan geographic
The 679 area code covers Michigan, Eastern time zone, and dates back to November 7, 2025. It is part of the 313/679 overlay complex — these codes share the same territory. Note that porting and VoIP mean a 679 number can be used from anywhere — the code marks where the number was assigned.
679 was created from 313 in 2025.
Dialing: 10D locally, 10D to other codes (1+10 digit dialing permissible at service provider discretion).
If a 679 call asks for money or personal data, treat the displayed number as unverified: hang up and reach the organization through its published number. Numbering data locates numbers, not callers.
NANPA projects numbering capacity for the 313/679 complex to exhaust in 2Q 2091.
FAQ
Why am I getting spam calls from 679 numbers?
Scammers spoof real area codes so calls look legitimate. A displayed 679 number does not prove the call originated there — see our guide to spotting spoofed calls.
Where is a 679 number from?
679 is assigned to Michigan in the Eastern time zone. The three digits after the area code (the prefix) narrow it down to a rate center.
Is 679 a toll-free number?
No. 679 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.
Why do 313 and 679 cover the same place?
They are overlays: when a code runs low on numbers, a new code is added over the same territory instead of splitting it. The 313/679 complex shares one service area, and local calls are dialed with 10 digits.
Will 679 run out of numbers?
NANPA's current forecast projects exhaust in 2Q 2091 — decades of capacity remain.