The 810 area code serves the Flint area and the Thumb region of eastern Michigan, covering Genesee and St. Clair counties. Created in 1993 in a split from Detroit’s 313 code, it is now overlaid by area code 679. If an 810 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 810 at a Glance
| Detail | Information |
|---|---|
| Area Code | 810 |
| State | Michigan (MI) |
| Major Cities | Flint, Port Huron, Lapeer, Fenton |
| Time Zone | Eastern Time (ET) |
| Country Code | +1 (USA) |
| Overlay Codes | 679 (co-located) |
Geographic Coverage & Major Cities
Area code 810 covers the Flint area and the Thumb region of eastern Michigan, including Genesee, St. Clair, Lapeer, and Shiawassee counties. It sits north of the Detroit metro along the shore of Lake Huron.
- 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
From auto heritage in Flint to Lake Huron shore towns, an 810 number is closely tied to the identity of eastern Michigan.
A Brief History of Area Code 810
Area code 810 was created in 1993 in a split from the 313 code. It originally covered Oakland and Macomb counties as well, but 248 (Oakland) split off in 1997 and 586 (Macomb) in 2001, leaving 810 with the Flint area and the Thumb. The 679 overlay was added in 2021, and 10-digit dialing became mandatory.
Time Zone & Best Time to Call
Numbers in the 810 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 810
Because 810 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 – 810-XXX-XXXX.
- 11-digit dialing: You can also dial 1-810-XXX-XXXX; the leading 1 is the NANP country code.
Calling from outside the United States
- Format: [exit code] + 1 + 810 + XXX + XXXX
- From the UK, Europe, or most of Asia/Africa: 00 1 810 XXX XXXX
- From any mobile phone worldwide: +1 810 XXX XXXX
Is Area Code 810 a Scam? Safety & Protection Tips
Area code 810 is a legitimate Michigan area code – a call from it is not fraudulent by default. However, scammers frequently spoof local codes like 810, 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 810 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 810 shares and borders several other Michigan codes:
- 679 – the overlay that shares the Flint and Thumb region with 810 (see our 679 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 810
Where is the 810 area code located?
Area code 810 covers the Flint area and the Thumb region of eastern Michigan, including Port Huron, Lapeer, and Fenton. It operates on Eastern Time and is overlaid by area code 679.
What is the difference between 810 and 679?
There is no geographic difference. 679 is an overlay covering the exact same Flint and Thumb territory as 810; it was added in 2021 simply to supply more phone numbers.
Is 810 a landline or cell phone area code?
Both. Area code 810 serves landlines, mobile phones, and VoIP numbers throughout the Flint area and the Thumb.
Should I answer a call from an unknown 810 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 810 Guides
- Is a 810 call safe? Read Is area code 810 a scam? Spam & safety guide.
- Local coverage: see the Flint area code guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.