| 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 |
|---|---|---|---|
| 310-221 | Los Angeles | San Pedro, CA | Pacific Bell |
| 310-222 | Los Angeles | Torrance, CA | Pacific Bell |
| 310-223 | Los Angeles | Compton, CA | Pacific Bell |
| 310-224 | Los Angeles | Torrance, CA | Pacific Bell |
| 310-225 | Los Angeles | Gardena, CA | Pacific Bell |
| 310-226 | Los Angeles | Beverly Hills, CA | Pacific Bell |
| 310-227 | Los Angeles | El Segundo, CA | T-mobile Usa |
| 310-228 | Los Angeles | Los Angeles, CA | Teleport Communications Group - Los Angeles |
| 310-229 | Los Angeles | Beverly Hills, CA | Pacific Bell |
| 310-230 | Los Angeles | Santa Monica, CA | Verizon California Inc.-ca (gte) |
| 310-231 | Los Angeles | Los Angeles, CA | Verizon California Inc.-ca (gte) |
| 310-232 | Los Angeles | Santa Monica, CA | Usa Mobility Wireless |
| 310-233 | Los Angeles | San Pedro, CA | Pacific Bell |
| 310-234 | Los Angeles | Los Angeles, CA | Verizon California Inc.-ca (gte) |
| 310-235 | Los Angeles | Los Angeles, CA | Verizon California Inc.-ca (gte) |
| 310-236 | Los Angeles | Santa Monica, CA | Usa Mobility Wireless |
| 310-237 | Los Angeles | Los Angeles, CA | Teleport Communications Group - Los Angeles |
| 310-238 | Los Angeles | Santa Monica, CA | Usa Mobility Wireless |
| 310-239 | Los Angeles | Santa Monica, CA | Usa Mobility Wireless |
| 310-240 | Los Angeles | Gardena, CA | Usa Mobility 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.