313 Area CodeDetroit, MI
Area code 313 covers Detroit and nearby communities in Michigan, in the Eastern Time (ET) zone, home to about 1.1 million people across 18 cities. It overlays 679, so the same region uses both and every local call needs all ten digits.
Where is area code 313?
Area code 313 serves part of Detroit, MI and the surrounding areas. It has a single overlay (679) that serves the same area.
Overview of the 313 Area Code
What is the 313 area code?
The 313 area code serves Detroit, Michigan, alongside other established area codes. When you see a 313 number, it indicates a local number within this geographic area.
Why was area code 313 created?
The 313 area code was introduced as an overlay to add numbers in Detroit once the existing area code 679 began to run out of available prefixes. It added a new supply of numbers without requiring current residents to change their existing digits.
Geographic Coverage of the 313 Area Code
The 313 area code serves Detroit and surrounding areas in Michigan. It operates within the Eastern Time (ET) time zone. It complements the coverage of area code 679. This area code covers several key cities, including:
- Detroit
- Dearborn
- Taylor
- Dearborn Heights
- Lincoln Park
- Allen Park
Got a call from a 313 number? It came from Detroit, MI. Since 313 overlays with 679, every local call in the region needs all ten digits to land on the right line. Inside 313, Detroit holds about 59% of the population; the rest is split across 17 smaller cities.
Detroit Area Codes Overview
Detroit is served by multiple area codes, reflecting its telecommunications needs. The 313 area code operates alongside 679. Here are the area codes serving this region:
The introduction of the 313 area code helped prevent number exhaustion, ensuring a continuous supply of phone numbers across the geographic area.
What cities does area code 313 cover?
| City | State | Population | % of Area Code | % of City |
|---|---|---|---|---|
| Detroit | MI | 645,705 | 58% | 97% |
| Dearborn | MI | 106,377 | 10% | 100% |
| Taylor | MI | 61,544 | 5% | 46% |
| Dearborn Heights | MI | 61,040 | 5% | 100% |
| Lincoln Park | MI | 38,774 | 2% | 100% |
| Allen Park | MI | 27,604 | 3% | 100% |
| Hamtramck | MI | 27,424 | 1% | 100% |
| Inkster | MI | 25,108 | 2% | 61% |
| Grosse Pointe Woods | MI | 15,897 | 1% | 100% |
| Harper Woods | MI | 14,936 | 1% | 100% |
* Sources: Population – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). Area code assignments – NANPA CO Code data. See our data methodology.
Has area code 313 been reported for unwanted calls?
Yes – 606 unwanted-call complaints were reported to the FTC for numbers showing a 313 area code (May 29 – Jul 2, 2026).
- 58% robocalls
- ↑ 2% vs prior period
Most-reported subjects
- Other41%247
- Reducing your debt (credit cards, mortgage, student loans)31%185
- Calls pretending to be government, businesses, or family and friends8%48
* Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints. Source: FTC Do Not Call (DNC) Reported Calls Data, retrieved 2026-07-05.
Which prefixes and exchanges belong to area code 313?
73% assigned to a telco
- 73% Landline
- 27% Wireless
- 0% Unknown
| Prefix | Usage | Carrier |
|---|---|---|
| (313)200- | Landline | Omnipoint Communications Midwest Operations |
| (313)201- | Landline | American Messaging Services |
| (313)202- | Landline | Teleport Communications America |
| (313)203- | Landline | Teleport Communications America |
| (313)204- | Wireless | New Cingular Wireless Pcs |
| (313)205- | Wireless | Sprint Spectrum |
| (313)206- | Landline | Michigan Bell Tel Co |
| (313)207- | Wireless | Sprint Spectrum |
| (313)208- | Landline | Metropcs |
| (313)209- | Landline | Peerless Network Of Michigan |
Frequently Asked Questions about the 313 Area Code
Who called me from a 313 number?
A 313 number is assigned to Detroit, Michigan, so a call may come from there. But caller ID is easy to fake, and scammers often spoof a local 313 code to look nearby, so a 313 number doesn't prove the caller is local. Recently, 606 unwanted-call complaints were reported to the FTC for numbers showing the 313 code (58% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.
Is 313 a scam area code?
No area code is a scam on its own. 313 is a normal, officially assigned code for Detroit, Michigan. Spam callers spoof local codes to raise the odds you answer, so 313 on your caller ID says nothing about who is really calling. Recently, 606 unwanted-call complaints were reported to the FTC for numbers showing the 313 code (58% flagged as robocalls). Judge the call itself, not the area code.
Why do I keep getting calls from the 313 area code?
Repeated calls from different 313 numbers are usually spoofing: a robocaller rotates through 313 numbers so each call looks local and slips past simple blocks. Recently, 606 unwanted-call complaints were reported to the FTC for numbers showing the 313 code (58% flagged as robocalls). Blocking one number rarely helps; voicemail screening, your carrier spam filter, and the Do Not Call Registry work better.
Should I answer an unknown 313 number?
If you aren't expecting a 313 call, let it ring to voicemail. Legitimate callers leave a message, most robocallers hang up when no one picks up, and answering can mark your number as active and bring more calls.
How do I block calls from the 313 area code?
Block a single 313 number from your recent-calls list (iPhone: tap the number, then Block this Caller; Android: tap the number, then Block or report spam). To cut the volume, turn on Silence Unknown Callers on iPhone or spam protection on Android, enable spam filtering from your carrier, and register at DoNotCall.gov. Blocking the entire 313 code also stops legitimate local calls, so use it only as a last resort.
Where is area code 313?
Area code 313 covers Detroit and the surrounding area in Michigan, spanning 18 cities with about 1,090,048 residents. It shares its area with overlay code 679.
Is 313 a real area code?
Yes. 313 is an active code in the North American Numbering Plan, assigned by NANPA and in service for Detroit, Michigan. A real code can still show up on spoofed spam calls, so treat unknown 313 calls with normal caution.
What timezone is the 313 area code in?
The 313 area code is in the Eastern Time (ET). Because a number can be kept when someone moves or switches to VoIP, a specific 313 caller may not be in that zone.
How do I call a 313 number from abroad?
From outside the US, dial your country's exit code, then 1 (the US country code), then 313 and the seven-digit number. From a mobile phone you can usually just enter +1 313 followed by the number and let the phone add the exit code for you.