679 Area CodeDetroit, MI
Area code 679 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 313, so the same region uses both and every local call needs all ten digits.
Where is area code 679?
Area code 679 serves part of Detroit, MI and the surrounding areas. It has a single overlay (313) that serves the same area.
Overview of the 679 Area Code
What is the 679 area code?
The 679 area code serves Detroit, Michigan, alongside other established area codes. When you see a 679 number, it indicates a local number within this geographic area.
Why was area code 679 created?
The 679 area code was introduced as an overlay to add numbers in Detroit once the existing area code 313 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 679 Area Code
The 679 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 313. This area code covers several key cities, including:
- Detroit
- Dearborn
- Taylor
- Dearborn Heights
- Lincoln Park
- Allen Park
Got a call from a 679 number? It came from Detroit, MI. Since 679 overlays with 313, every local call in the region needs all ten digits to land on the right line. Inside 679, 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 679 area code operates alongside 313. Here are the area codes serving this region:
The introduction of the 679 area code helped prevent number exhaustion, ensuring a continuous supply of phone numbers across the geographic area.
What cities does area code 679 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 679 been reported for unwanted calls?
Yes – 2 unwanted-call complaints were reported to the FTC for numbers showing a 679 area code (Jun 18 – Jul 1, 2026).
- 50% robocalls
- → 0% vs prior period
Most-reported subjects
- Computer & technical support50%1
* 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.
Frequently Asked Questions about the 679 Area Code
Who called me from a 679 number?
A 679 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 679 code to look nearby, so a 679 number doesn't prove the caller is local. Recently, 2 unwanted-call complaints were reported to the FTC for numbers showing the 679 code (50% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.
Is 679 a scam area code?
No area code is a scam on its own. 679 is a normal, officially assigned code for Detroit, Michigan. Spam callers spoof local codes to raise the odds you answer, so 679 on your caller ID says nothing about who is really calling. Recently, 2 unwanted-call complaints were reported to the FTC for numbers showing the 679 code (50% flagged as robocalls). Judge the call itself, not the area code.
Why do I keep getting calls from the 679 area code?
Repeated calls from different 679 numbers are usually spoofing: a robocaller rotates through 679 numbers so each call looks local and slips past simple blocks. Recently, 2 unwanted-call complaints were reported to the FTC for numbers showing the 679 code (50% 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 679 number?
If you aren't expecting a 679 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 679 area code?
Block a single 679 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 679 code also stops legitimate local calls, so use it only as a last resort.
Where is area code 679?
Area code 679 covers Detroit and the surrounding area in Michigan, spanning 18 cities with about 1,090,048 residents. It shares its area with overlay code 313.
Is 679 a real area code?
Yes. 679 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 679 calls with normal caution.
What timezone is the 679 area code in?
The 679 area code is in the Eastern Time (ET). Because a number can be kept when someone moves or switches to VoIP, a specific 679 caller may not be in that zone.
How do I call a 679 number from abroad?
From outside the US, dial your country's exit code, then 1 (the US country code), then 679 and the seven-digit number. From a mobile phone you can usually just enter +1 679 followed by the number and let the phone add the exit code for you.