What area code is 313?
Here's everything about it.
Instant lookup for the 313 area code — location, time zone, cities served, and who's been calling from it. No sign-up, no app.
313 at a glance
Summary
Cities & regions served by 313
Detroit4 communities on record for 313.
Where 313 sits on the map
Overlay: 679Coverage area
About the 313 region
313 covers Detroit in Michigan, including Dearborn, Grosse Pointes and Highland Park. The code has been in service since 1947 and is one of the original North American area codes.
As the Detroit region grew, 313 ran low on available numbers, so 679 was added as an overlay code over the same geographic area. Both codes are local to each other and 10-digit dialing applies throughout.
1993: split to create 810; 1997: split to create 734; 2025: overlaid by 679.
Who called me from 313?
Community reports- Caller ID is trivially spoofed: an incoming call that displays 313 does not prove the caller is really in the 313 region or even in the United States.
- Avoid calling back unknown one-ring numbers — some premium-rate scams rely on curiosity callbacks.
- Never share verification codes, payment details, or remote access during an unsolicited call, even if the caller claims to be your bank or a government agency.
- When a 313 call pressures you to act immediately, hang up and contact the organization directly through its official number.
Be the first to add a community report for a 313 number below.
Frequently asked questions
FAQWhat area code is 313?+–
313 is a telephone area code serving Detroit in Michigan, United States, in service since 1947.
Where is area code 313 located?+–
It covers Dearborn, Grosse Pointes and Highland Park in Michigan.
What cities are in area code 313?+–
Major communities on record include Dearborn, Grosse Pointes and Highland Park. The code's territory spans the Detroit region of Michigan.
What time zone is 313?+–
313 observes Eastern (ET), which is UTC−5 / −4 DST and follows daylight saving time.
When did area code 313 start?+–
313 entered service in 1947 as one of the original 1947 North American area codes. Its history: 1993: split to create 810; 1997: split to create 734; 2025: overlaid by 679.
Why do calls to 313 require 10-digit dialing?+–
313 shares its territory with overlay code 679. Because both codes serve the same geographic area, the phone network needs all 10 digits to route a call, and calls between the codes are still local.
Is 313 a scam area code?+–
Scam and robocall traffic can use any North American code, 313 included — caller ID is easy to spoof, so the code alone does not tell you who is really calling. Check the community reports on this page before calling back an unknown 313 number, and report anything suspicious.
Can I get a 313 phone number?+–
Yes — most mobile carriers and VoIP providers let you request a 313 number regardless of where you physically live.