679 area code
Detroit area, Eastern Time.Area code 679 covers Detroit in Michigan, on Eastern Time. 313 covers the same area.
Right now in Detroit
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer)
Calling hours: Every day, 9 AM to 9 PM (Michigan law)
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Where 679 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 679 covers 1, but it's new and has barely been issued yet, so these are ranked by the numbers its overlay already holds. Its biggest metro area is Detroit-Warren-Dearborn, MI.
Detroit
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 679 number?
Sales calls to homes and cell phones have legal hours, set by Michigan law. Hold every 679 number to them, since you can't tell a work line from a personal cell.
What applies to 679Every day, 9 AM to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
- Michigan lawEvery day, 9 AM to 9 PMIn a harassment statute that needs intent to annoy.MCL 750.540e(1)(f) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
679 and 313
679 went into service on November 7, 2025. 679 and 313 cover the same area, so new numbers can get either code and neighbors can have different area codes. 679 holds 0% of the area's exchanges; 313 holds the most. Local calls take all 10 digits.
- 1947313 overlay
- 2025679 starts
Source: NANPA area code database
Calling a list of 679 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
679 area code FAQ
What area code is 679?
679 is a Michigan area code for Detroit.
What time zone is the 679 area code in?
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer).
Is 313 the same as 679?
Same area, different code. 679 and 313 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 679 numbers?
Every day, 9 AM to 9 PM, local time, under Michigan law.
When did the 679 area code start?
On November 7, 2025.
Calling 679 numbers? Reach more of them.
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