Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — AREA-CODE/313

313 area code

Area code 313 is in Michigan. It covers Detroit, Grosse Pointe Woods, Melvindale and 5 other places: 50 ZIP codes in Wayne County. Local time there is , Eastern Time. In service since 1947; 679 (2025) overlays it, so a number from there can have either code.

Time zone
Eastern
Largest city
Detroit
Overlays
679
In service since
1947
Rate centres
6
Prefixes assigned
769 (7,690,000 numbers)

Who calls from a 313 number

NANPA records the carrier each block of 313 numbers is assigned to. Of the 7.7 million 313 numbers assigned, 44% are with mobile carriers (T-Mobile, AT&T Mobility and Verizon Wireless); 28% with local phone companies (AT&T); 24% with cable, internet-calling, business and other carriers (Onvoy and Bandwidth); 5% with paging companies.

That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.

Carriers holding the most 313 numbers
CarrierKindShare
AT&TLandline28%
T-MobileMobile26%
AT&T MobilityMobile10%
Verizon WirelessMobile7%
OnvoyCable, VoIP, other7%
BandwidthCable, VoIP, other5%

An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.

Places in area code 313

The 1 place with a telephone rate centre of its own using 313, largest first. Each links to its ZIP codes.

Places in area code 313
PlaceZIP codesPopulation
Detroit, MI 46 638,530

Nearby places using 313

These places have no rate centre of their own in NANPA's records; the nearest one uses 313. Near an area-code boundary that can be wrong for part of a town.

ZIP codes in area code 313

50 ZIP codes in 4 towns, by the town each is mailed to, largest first. Each links to its own page.

Where 313 numbers are issued

NANPA's rate centres with the most 313 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.

Rate centres using area code 313
Rate centrePlacePrefixes
DETROITZN5 Detroit 272
DETROITZN6 Detroit 155
DETROITZN1 Detroit 152
DETROITZN4 Detroit 71
DETROITZN2 Detroit 69
DETROITZN3 Detroit 50

Counties

The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.

Which code covers where you are now? What area code am I in? answers from your location.

Questions about area code 313

Where is area code 313?

Area code 313 is in Michigan. It covers Detroit, Grosse Pointe Woods, Melvindale and 5 other places: 50 ZIP codes in Wayne County.

What ZIP codes are in area code 313?

50 ZIP codes, by the town each is mailed to: Detroit (46, 48201 to 48288), Melvindale (48122), River Rouge (48218), Grosse Pointe (2, 48230 to 48236). The full list is on this page.

What time zone is area code 313 in?

Eastern time.

Is a 313 number a mobile or a landline?

It can be either. 44% of 313 numbers are assigned to mobile carriers and 28% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.

What area codes overlay 313?

679. They cover the same area as 313, so a new number there can be given any of them.

Does a 313 number mean the caller is in Michigan?

Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 313 call can come from anywhere.

Other area codes in Michigan

All 13 Michigan area codes, by area, with the cities each covers

Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.

Cite this page

zipcodes.pro. “Area code 313.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/313

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