313 Area Code — Detroit, MI
Area code 313 serves Detroit and 2 other cities in Michigan. Local time follows America/New_York. It has no overlay codes.
- State
- Michigan
- Primary city
- Detroit
- Timezone
- America/New_York
- In service since
- 1947
- Type
- Geographic
- Overlay codes
- None
Cities Served by 313
The 313 area code covers 3 cities and communities in Michigan.
- Detroit
- Dearborn
- Highland Park
About Area Code 313
Area code 313 is a North American Numbering Plan (NANP) area code that has been in service since 1947. It is administered by NANPA on behalf of the FCC and serves the Michigan region anchored on Detroit.
313 is currently a single-coverage geographic area code with no overlays. This means a 7-digit number in this area code is unique within its rate centers, though best-practice is always to dial the full 10-digit number when contacting a 313 line.
Mobile numbers in 313 are portable: a person who moved away from Detroit may still carry a 313 mobile number on their device. If you receive an unexpected call from a 313 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. See the related codes section below to explore the rest of Michigan.
Other Michigan Area Codes
Continue exploring the Michigan numbering plan.
313 Area Code FAQ
Where is area code 313?
Area code 313 is located in Michigan, primarily serving Detroit and surrounding cities including Dearborn, Highland Park. The region operates on ET (America/New_York) time.
What state is 313 area code?
313 is a Michigan area code. It was put into service in 1947 and has no overlay codes — it covers its geographic area exclusively.
Is 313 a scam area code?
313 is a legitimate North American area code allocated by NANPA to Michigan. Like any geographic area code, scammers sometimes spoof 313 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 313 use?
Area code 313 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 313 phone number?
Yes. Use the reverse lookup widget above to enter a full 313 number. NumLocation returns the line type (mobile, landline, VoIP), carrier, rate-center city, and any public listings tied to the number — free.