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US area code · Michigan

313 area code

Where the 313 area code is, its overlay and how to dial a +1 313 number from anywhere.

CoversDetroit, MichiganTime zoneEastern (ET)TypeOverlay
Quick answer

The 313 area code is in Detroit, Michigan, United States (Eastern (ET)). To call from abroad: +1 313 555-0123. It is an overlay, so all 10 digits are dialled.

StateMichigan
Main areaDetroit
Time zoneEastern (ET)
TypeOverlay
10-digit dialingRequired
In service since01-Jan-1947

The 313 area code is a geographic North American Numbering Plan (NANP) code covering Detroit, Michigan. It has been in service since 01-Jan-1947 and sits in the Eastern (ET) time zone.

Overlay 313 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

313679

How to dial a 313 number

From abroad+1 313 555-0123
Within the US / Canada1 313 555-0123
Locally (same area)313 555-0123

Cities in the 313 area code

A 313 number is usually in one of these places in Michigan — 1 county.

Allen Park WayneDearborn WayneDearborn Heights WayneDetroit WayneHamtramck WayneInkster WayneLincoln Park WayneRedford WayneTaylor Wayne

Other Michigan area codes

231248269517586616679734810906947989

Frequently asked questions

Where is the 313 area code?

The 313 area code is in Detroit, Michigan, United States (Eastern (ET)).

Is 313 an overlay area code?

Yes. 313 overlays the same region as 679, so callers dial all 10 digits.

Do I have to dial 10 digits for 313?

Yes — dial the area code plus the seven-digit number.

How do I call a 313 number from another country?

Dial your exit code (or +), then 1, then 313, then the number: +1 313 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 313 number does not pinpoint a street or ZIP code.

Number holders in area code 313

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 782 prefixes are in use in 313, shared by 38 companies. The largest holders:

CompanyPrefixesShare
Michigan Bell Tel Co24431%
Omnipoint Communications Midwest Operations, LLC14118%
New Cingular Wireless PCS, LLC9512%
Cellco Partnership Dba Verizon Wireless547%
Bandwidth.Com CLEC, LLC284%
Onvoy, Llcv253%

Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.

Complaints about 313 numbers

Reports to the FTC, last 30 days
514
Recorded messages or robocalls
62%
Rank among area codes
#193 of 670
Most reported subjects
Other (214)
Reducing your debt (credit cards, mortgage, student loans) (135)
Calls pretending to be government, businesses, or family and friends (67)

Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.

Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).

All US area codes United States +1 Map of area code 313 — cities & rate centres

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