Area code 810: Michigan
Area code 810 is a US state area code for Michigan, on Eastern Time. It has 507 prefixes in service across 49 rate centers, the largest being Flint, Lapeer and Port Huron. NANPA lists no overlay code for it. Local calls there take 10 digits.
Local time in area code 810
America/New_York
Prefixes in service
507 of 792 possible
49 rate centers
Area code 810 facts
| Location | Michigan, United States |
|---|---|
| Time zone | Eastern Time |
| Overlays | None |
| Split from | 313 |
| In service since | December 1, 1993 |
| Local calls | 10 digits; toll calls 1 + 10 digits |
| Carrier | Not shown. An area code is where a number was issued; numbers port between carriers. Check line type |
Which cities and towns use area code 810?
NANPA records each prefix against a rate center, the local billing area a number belongs to, usually named after its main town. These are the 810 rate centers with the most prefixes in service. 37 smaller ones aren't listed.
| Rate center | Prefixes |
|---|---|
| Flint | 139 |
| Lapeer | 44 |
| Port Huron | 44 |
| Brighton | 39 |
| Grand Blanc | 16 |
| Fenton | 15 |
| Davison | 11 |
| Algonac | 11 |
| Sandusky | 10 |
| Clio Mount Morris | 9 |
| Marine City | 9 |
| Imlay City | 8 |
Source: NANPA central office code assignments, file dated 10/17/2026. Each prefix holds up to 10,000 numbers.
How do I dial a 810 number?
NANPA's dialling plan for 810: local calls inside the code take 10 digits, toll calls 1 + 10 digits. From another area code, dial 1 first. From abroad, use +1. The examples use 555-0147, from a range reserved for fictional numbers.
| Local call inside 810 | 810-555-0147 |
|---|---|
| From another US or Canadian area code | 1-810-555-0147 |
| From outside North America | +1 810 555 0147 |
| E.164, for CRMs and SMS tools | +18105550147 |
When did area code 810 start?
Area code 810 went into service on December 1, 1993, split from 313. It has no overlay, so every number in its area still starts with it.
Tools for 810 numbers
- Area code lookup
Look up any code or a whole list of numbers, or find the codes for a state or city.
- Area code time zone
Local time for a list of numbers, with a callable-now flag.
- NPA-NXX lookup
Rate center and state for one prefix, a level below the area code.
- TCPA calling hours checker
Whether it's inside the federal 8 a.m. to 9 p.m. calling window there now.
Next step
A 810 number tells you where it was issued, not what it is now.
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Area code 810 questions
- What state is area code 810?
- Area code 810 is in Michigan, United States. Its largest rate centers by number of prefixes are Flint, Lapeer, Port Huron, Brighton and Grand Blanc.
- What time zone is area code 810 in?
- Eastern Time.
- Does area code 810 have an overlay?
- Not as of NANPA's file dated 10/16/2026. Every number in its area uses 810.
- When did area code 810 start?
- Area code 810 went into service on December 1, 1993, split from 313.
- Is an 810 number a cell phone or a landline?
- The area code can't tell you. In the US and Canada mobiles, landlines and VoIP lines share area codes and prefixes, and numbers move between carriers and line types. Only a live line-type lookup answers it for one number.
- How many phone numbers does area code 810 have?
- 507 of its 792 possible prefixes are in service, and each prefix holds up to 10,000 numbers. That counts prefixes assigned to carriers, not numbers in use.
Other area codes in Michigan
Sources
Location, overlays, in-service date and dialling plan: NANPA NPA database, file dated 10/16/2026. Prefixes and rate centers: NANPA central office code assignments, 10/17/2026. Time zones mapped to the IANA time zone database. By the SimpleVerifier Team; how we build these pages.