| District of California area codes: 310 | |
|---|---|
| Country | United States |
| State/Province | California |
| Major City | Los Angeles |
| Time Zone | Pacific (UTC-08:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 310-402 | Los Angeles | Los Angeles, CA | Level 3 Communications |
| 310-403 | Los Angeles | Los Angeles, CA | Sprint Spectrum L.p. |
| 310-404 | Los Angeles | Gardena, CA | AT&T Local |
| 310-405 | Los Angeles | Lakewood, CA | Cellco Partnership DBA Verizon Wireless |
| 310-406 | Los Angeles | Hermosa Beach, CA | Verizon California Inc.-ca (gte) |
| 310-407 | Los Angeles | Beverly Hills, CA | Pacific Bell |
| 310-408 | Los Angeles | Torrance, CA | New Cingular Wireless PCS |
| 310-409 | Los Angeles | Los Angeles, CA | O1 Communications |
| 310-410 | Los Angeles | Inglewood, CA | Pacific Bell |
| 310-412 | Los Angeles | Inglewood, CA | Pacific Bell |
| 310-413 | Los Angeles | Los Angeles, CA | Cellco Partnership DBA Verizon Wireless |
| 310-414 | Los Angeles | El Segundo, CA | Pacific Bell |
| 310-415 | Los Angeles | Los Angeles, CA | Cellco Partnership DBA Verizon Wireless |
| 310-416 | Los Angeles | El Segundo, CA | Pacific Bell |
| 310-417 | Los Angeles | Inglewood, CA | Pacific Bell |
| 310-418 | Los Angeles | Gardena, CA | New Cingular Wireless PCS |
| 310-419 | Los Angeles | Inglewood, CA | Pacific Bell |
| 310-420 | Los Angeles | Santa Monica, CA | Sprint Spectrum L.p. |
| 310-421 | Los Angeles | Los Angeles, CA | Pac - West Telecomm |
| 310-422 | Los Angeles | Los Angeles, CA | Cellco Partnership DBA Verizon Wireless |
There are 787 prefixes, In the code area, the major cities are Beverly Hills, CA;Carson, CA;Culver City, CA;Garde. The major city is Los Angeles.