The 679 area code is an overlay serving the Flint area and the Thumb region of eastern Michigan, layered over the 810 code. Introduced in 2021 to supply new phone numbers, 679 covers the exact same territory as 810. If a 679 number has appeared on your caller ID, this guide explains where it comes from, how to dial it, and how to stay safe from spoofed calls.
Quick Summary: Area Code 679 at a Glance
| Detail | Information |
|---|---|
| Area Code | 679 |
| State | Michigan (MI) |
| Major Cities | Flint, Port Huron, Lapeer, Fenton |
| Time Zone | Eastern Time (ET) |
| Country Code | +1 (USA) |
| Overlay Codes | 810 (co-located) |
Geographic Coverage & Major Cities
Area code 679 covers the Flint area and the Thumb region of eastern Michigan, including Genesee, St. Clair, Lapeer, and Shiawassee counties. Because it is an overlay, it shares the identical footprint of the 810 area code rather than covering a separate zone.
- Flint – the largest city in the region, a historic auto-manufacturing center
- Port Huron – a St. Clair County city on the Canadian border
- Lapeer & Fenton – established communities north of Detroit
- The Thumb – the agricultural region jutting into Lake Huron
As the newer code over the region, 679 numbers are common among lines set up after the original 810 numbers grew scarce.
A Brief History of Area Code 679
Area code 679 was activated in 2021 as an all-services overlay on the 810 region. The 810 code dates to 1993. An overlay adds a second area code across the same geographic area, so existing 810 customers kept their numbers while new lines could be assigned either code, under mandatory 10-digit dialing.
Time Zone & Best Time to Call
Numbers in the 679 area code use Eastern Time (ET). The region observes Daylight Saving Time, shifting from EST (UTC-5) to EDT (UTC-4) between March and November each year.
How to Dial Phone Numbers in Area Code 679
Because 679 shares its region under an overlay, the area requires 10-digit dialing on every call.
Calling within the United States or Canada
- 10-digit dialing: Include the area code – 679-XXX-XXXX.
- 11-digit dialing: You can also dial 1-679-XXX-XXXX; the leading 1 is the NANP country code.
Calling from outside the United States
- Format: [exit code] + 1 + 679 + XXX + XXXX
- From the UK, Europe, or most of Asia/Africa: 00 1 679 XXX XXXX
- From any mobile phone worldwide: +1 679 XXX XXXX
Is Area Code 679 a Scam? Safety & Protection Tips
Area code 679 is a legitimate Michigan area code – a call from it is not fraudulent by default. However, scammers frequently spoof local codes like 679, faking the caller ID so their number appears to come from a trusted local line. Neighbor spoofing, which mimics the first six digits of your own number, is especially common.
Common scam tactics linked to this region
| Scam type | What to watch for |
|---|---|
| Government impersonation | Callers posing as the IRS or SSA threatening arrest or fines |
| Bank & card fraud alerts | Claims of suspicious activity seeking your account details |
| Utility shut-off threats | Fake Consumers Energy or DTE Energy disconnection demands |
| Package delivery scams | Fake texts or calls about a failed delivery with a bad link |
How to report, block, and look up 679 callers
- Never share personal or financial details with an unexpected caller, however urgent they sound.
- Block the number using your phone’s built-in call-blocking feature or a reputable call-screening app.
- Look up the number with a trusted reverse phone lookup before returning any call.
- Report it to the FTC at reportfraud.ftc.gov and register at DoNotCall.gov.
Nearby & Related Area Codes in Michigan
Area code 679 shares and borders several other Michigan codes:
- 810 – the original Flint and Thumb code that 679 overlays (see our 810 area code guide)
- 586 – Macomb County to the south (see our 586 area code guide)
- 248 & 947 – Oakland County to the southwest (see our 248 area code guide)
- 989 – the Saginaw area and central Michigan to the north (see our 989 area code guide)
Explore more codes across the state on our Michigan area codes hub, or browse every prefix in our US area codes directory.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border Michigan:
Frequently Asked Questions About Area Code 679
Where is the 679 area code located?
Area code 679 covers the Flint area and the Thumb region of eastern Michigan, including Port Huron, Lapeer, and Fenton, as an overlay of the 810 code. It operates on Eastern Time.
What is the difference between 679 and 810?
There is no geographic difference. 679 overlays the exact same Flint and Thumb territory as 810; it was added in 2021 simply to supply more phone numbers.
Is 679 a landline or cell phone area code?
Both. Area code 679 serves landlines, mobile phones, and VoIP numbers throughout the Flint area and the Thumb.
Should I answer a call from an unknown 679 number?
If you are not expecting the call, let it go to voicemail. Legitimate callers leave a message, while spoofed or robocall numbers usually will not. Verify any unfamiliar number with a reverse lookup before calling back.
Related 679 Guides
- Worried about spam or robocalls? Browse our Scam Alerts directory.