310 Area Code — California
310 is a North American Numbering Plan area code for California, the United States. It covers about 1,028,120 people in 18 towns and 58 ZIP codes, including Torrance, Compton and Inglewood.
| Field | Value |
|---|---|
| Area code | 310 |
| Country | United States (+1) |
| State / province | California |
| Type | Shares its towns with 424 |
| Time zone | Pacific |
| Population covered | 1,028,120 |
| Towns covered | 18 |
| ZIP codes | 58 |
| Approx. centre | 33.888, -118.355 |
Where area code 310 is used
Area code 310 is assigned to California, the United States, inside the North American Numbering Plan. Numbers in the code are written (310) NXX-XXXX at home and +1 310 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.
Other area codes in this footprint: 424. They serve towns in the same territory, so a single street can contain numbers from more than one code. That is normal in the NANP and does not change how you dial.
Towns and cities in area code 310
The 18 towns below are the largest in the 310 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 |
|---|---|---|---|
| Torrance | Los Angeles County | 171,940 | 10 |
| Compton | Los Angeles County | 131,353 | 5 |
| Inglewood | Los Angeles County | 127,928 | 12 |
| Hawthorne | Los Angeles County | 93,826 | 2 |
| San Pedro | Los Angeles County | 85,011 | 4 |
| Redondo Beach | Los Angeles County | 77,267 | 2 |
| Lynwood | Los Angeles County | 64,235 | 1 |
| Wilmington | Los Angeles County | 52,800 | 2 |
| Culver City | Los Angeles County | 47,563 | 4 |
| Beverly Hills | Los Angeles County | 38,852 | 5 |
| Lawndale | Los Angeles County | 32,075 | 2 |
| Harbor City | Los Angeles County | 26,761 | 1 |
Counties covered
| County | ZIP codes |
|---|---|
| Los Angeles County | 58 |
Other area codes serving the same towns
Nearby area codes
How to dial area code 310
- Within North America: 310 + 7-digit number (310-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 310, then the 7-digit number — for example 00 1 310 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 310?
310 is a North American Numbering Plan area code assigned to California, the United States. It covers about 1,028,120 people in 18 towns.
Is 310 a US or Canadian area code?
310 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 310 in?
Area code 310 is in the Pacific 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.