408 Area Code — California
408 is a North American Numbering Plan area code for California, the United States. It covers about 1,887,015 people in 18 towns and 102 ZIP codes, including San Jose, Salinas and Sunnyvale.
| Field | Value |
|---|---|
| Area code | 408 |
| Country | United States (+1) |
| State / province | California |
| Type | Shares its towns with 669 |
| Time zone | Pacific |
| Population covered | 1,887,015 |
| Towns covered | 18 |
| ZIP codes | 102 |
| Approx. centre | 37.246, -121.865 |
Where area code 408 is used
Area code 408 is assigned to California, the United States, inside the North American Numbering Plan. Numbers in the code are written (408) NXX-XXXX at home and +1 408 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: 669. 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 408
The 18 towns below are the largest in the 408 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 |
|---|---|---|---|
| San Jose | Santa Clara County | 1,011,444 | 58 |
| Salinas | Monterey County | 195,417 | 8 |
| Sunnyvale | Santa Clara County | 154,236 | 5 |
| Santa Clara | Santa Clara County | 130,641 | 7 |
| Milpitas | Santa Clara County | 78,810 | 2 |
| Gilroy | Santa Clara County | 67,181 | 2 |
| Cupertino | Santa Clara County | 60,932 | 2 |
| Morgan Hill | Santa Clara County | 51,943 | 2 |
| Los Gatos | Santa Clara County | 50,064 | 4 |
| Campbell | Santa Clara County | 48,333 | 3 |
| Saratoga | Santa Clara County | 31,417 | 2 |
| San Martin | Santa Clara County | 6,324 | 1 |
Counties covered
| County | ZIP codes |
|---|---|
| Santa Clara County | 92 |
| Monterey County | 9 |
| Santa Cruz County | 1 |
Other area codes serving the same towns
Nearby area codes
How to dial area code 408
- Within North America: 408 + 7-digit number (408-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 408, then the 7-digit number — for example 00 1 408 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 408?
408 is a North American Numbering Plan area code assigned to California, the United States. It covers about 1,887,015 people in 18 towns.
Is 408 a US or Canadian area code?
408 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 408 in?
Area code 408 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.