Area code 679
Area code 679 serves Detroit and nearby parts of Michigan, including Dearborn, Livonia and Taylor. It is on Eastern Time, which observes daylight saving time. 313 is an overlay for the same area.
Area code 679 at a glance
| State | Michigan (MI) |
| Main city | Detroit |
| Time zone | Eastern Time |
| UTC offset | UTC−5 in winter, UTC−4 in summer |
| Daylight saving time | Yes |
| Overlay codes | 313 |
Cities in 679
- Detroit
- Dearborn
- Livonia
- Taylor
An area code shows where a number was first assigned. Mobile numbers keep their area code when people move, so the person you’re calling may be somewhere else.
When you can call a 679 number
Federal telemarketing rules under the TCPA allow sales calls between 8 AM and 9 PM in the called person’s local time. Michigan law is stricter: 9 AM to 9 PM. Here is that window for a 679 number, shown in your own time zone.
General information, not legal advice. Some states add rules for Sundays, holidays or the number of calls. See our calling hours guide.
| If you’re on | You can call 679 between |
|---|---|
| Eastern | 9:00 AM to 9:00 PM |
| Central | 8:00 AM to 8:00 PM |
| Mountain | 7:00 AM to 7:00 PM |
| Arizona | 6:00 AM to 6:00 PM |
| Pacific | 6:00 AM to 6:00 PM |
See the time in 679 without leaving your CRM
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Other area codes in Michigan
Questions about 679
What time zone is area code 679?
Area code 679 is on Eastern Time. It observes daylight saving time.
Where is area code 679?
Area code 679 is in Michigan. Its main city is Detroit, and it also covers Dearborn, Livonia and Taylor.
What are the legal hours to call a 679 number?
Under the federal TCPA, sales calls are allowed from 8 AM to 9 PM in the called person’s local time. Michigan law is stricter: 9 AM to 9 PM. Personal and informational calls are not limited by these hours.
What area codes overlay 679?
313 covers the same area as 679, so numbers in the same town can have either code.