279 Area Code — California
279 is a North American Numbering Plan area code for California, the United States. It covers about 1,997,755 people in 31 towns and 145 ZIP codes, including Sacramento, Elk Grove and Roseville.
| Field | Value |
|---|---|
| Area code | 279 |
| Country | United States (+1) |
| State / province | California |
| Type | Shares its towns with 916 |
| Time zone | Pacific |
| Population covered | 1,997,755 |
| Towns covered | 31 |
| ZIP codes | 145 |
| Approx. centre | 38.594, -121.434 |
Where area code 279 is used
Area code 279 is assigned to California, the United States, inside the North American Numbering Plan. Numbers in the code are written (279) NXX-XXXX at home and +1 279 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: 916. 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 279
The 31 towns below are the largest in the 279 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 |
|---|---|---|---|
| Sacramento | Sacramento County | 850,564 | 100 |
| Elk Grove | Sacramento County | 190,119 | 4 |
| Roseville | Placer County | 161,837 | 3 |
| Citrus Heights | Sacramento County | 89,370 | 3 |
| Folsom | Sacramento County | 79,484 | 2 |
| Rancho Cordova | Sacramento County | 76,587 | 3 |
| Rocklin | Placer County | 73,077 | 2 |
| Carmichael | Sacramento County | 61,440 | 2 |
| Lincoln | Placer County | 57,459 | 1 |
| West Sacramento | Yolo County | 55,039 | 4 |
| Antelope | Sacramento County | 47,695 | 1 |
| El Dorado Hills | El Dorado County | 47,657 | 1 |
Counties covered
| County | ZIP codes |
|---|---|
| Sacramento County | 128 |
| Placer County | 10 |
| Yolo County | 5 |
| Sutter County | 1 |
| El Dorado County | 1 |
Other area codes serving the same towns
Nearby area codes
How to dial area code 279
- Within North America: 279 + 7-digit number (279-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 279, then the 7-digit number — for example 00 1 279 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 279?
279 is a North American Numbering Plan area code assigned to California, the United States. It covers about 1,997,755 people in 31 towns.
Is 279 a US or Canadian area code?
279 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 279 in?
Area code 279 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.