679 Area Code — Detroit, MI
Area code 679 serves Detroit and 1 other city in Michigan. Local time follows America/New_York. It overlays with 313, so 10-digit dialling is required.
- State
- Michigan
- Primary city
- Detroit
- Timezone
- America/New_York
- In service since
- 2021
- Type
- Overlay
- Overlay codes
- 313
Overlay of 313
Cities Served by 679
The 679 area code covers 2 cities and communities in Michigan.
- Detroit
- Dearborn
About Area Code 679
Area code 679 is a North American Numbering Plan (NANP) area code that has been in service since 2021. It is administered by NANPA on behalf of the FCC and serves the Michigan region anchored on Detroit.
679 is an overlay code, which means it shares its geographic boundaries with one or more existing area codes (313). Overlays are created when a region exhausts the supply of phone numbers in its original area code. Within an overlay region, residents must dial all 10 digits even for local calls, because the same 7-digit number can exist under multiple area codes.
Mobile numbers in 679 are portable: a person who moved away from Detroit may still carry a 679 mobile number on their device. If you receive an unexpected call from a 679 number, run it through the reverse lookup tool above for the most accurate, free identification.
If you live or do business in Michigan, you may also interact with neighbouring or overlay codes (313). See the related codes section below to explore the rest of Michigan.
Other Michigan Area Codes
Continue exploring the Michigan numbering plan.
679 Area Code FAQ
Where is area code 679?
Area code 679 is located in Michigan, primarily serving Detroit and surrounding cities including Dearborn. The region operates on ET (America/New_York) time.
What state is 679 area code?
679 is a Michigan area code. It was put into service in 2021 as an overlay and shares its geographic footprint with overlay code 313.
Is 679 a scam area code?
679 is a legitimate North American area code allocated by NANPA to Michigan. Like any geographic area code, scammers sometimes spoof 679 numbers — judge each call by content (urgent demands, unfamiliar transfers) rather than the area code alone. Run the specific number through our reverse lookup if you're unsure.
What time zone does 679 use?
Area code 679 operates on ET (America/New_York). Numbers in this area code follow standard Michigan time-zone rules including any daylight-saving transitions for that region.
Can I look up a specific 679 phone number?
Yes. Use the reverse lookup widget above to enter a full 679 number. NumLocation returns the line type (mobile, landline, VoIP), carrier, rate-center city, and any public listings tied to the number — free.
What's the difference between 679 and 313?
679 and 313 cover the same Michigan geographic area as overlay codes. Calls between them are local, but you must dial all 10 digits. New phone numbers in this region are assigned from either pool depending on what's available with the carrier at signup.