313 Area Code — Michigan
313 is a North American Numbering Plan area code for Michigan, the United States. It covers about 670,080 people in 4 towns and 50 ZIP codes, including Detroit, Grosse Pointe and Melvindale.
| Field | Value |
|---|---|
| Area code | 313 |
| Country | United States (+1) |
| State / province | Michigan |
| Type | Standalone (no other NANP code covers the same towns) |
| Time zone | Eastern |
| Population covered | 670,080 |
| Towns covered | 4 |
| ZIP codes | 50 |
| Approx. centre | 42.336, -83.092 |
Where area code 313 is used
Area code 313 is assigned to Michigan, the United States, inside the North American Numbering Plan. Numbers in the code are written (313) NXX-XXXX at home and +1 313 NXX-XXXX when dialled from outside Canada and the United States. Since the NANP moved to 10-digit dialling you must always include the area code, even for a local call.
Towns and cities in area code 313
The 4 towns below are the largest in the 313 footprint, ranked by population. Every one of them links to its own page with the full list of area codes and ZIP codes for that town.
| Town | County | Population | ZIP codes |
|---|---|---|---|
| Detroit | Wayne County | 601,906 | 46 |
| Grosse Pointe | Wayne County | 48,609 | 2 |
| Melvindale | Wayne County | 12,554 | 1 |
| River Rouge | Wayne County | 7,011 | 1 |
Counties covered
| County | ZIP codes |
|---|---|
| Wayne County | 50 |
Nearby area codes
How to dial area code 313
- Within North America: 313 + 7-digit number (313-NXX-XXXX). The leading 1 is optional on a mobile phone and required on most landlines for long-distance.
- From abroad: your country's international prefix, then 1, then 313, then the 7-digit number — for example 00 1 313 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 313?
313 is a North American Numbering Plan area code assigned to Michigan, the United States. It covers about 670,080 people in 4 towns.
Is 313 a US or Canadian area code?
313 is a United States area code. Canada and the United States share the +1 country code, so both are part of the same numbering plan.
What time zone is area code 313 in?
Area code 313 is in the Eastern time zone.
Do I have to dial 10 digits?
Yes. Every NANP call now requires the area code plus the seven-digit number, even for a local call.