| District of California area codes: 650 | |
|---|---|
| Country | United States |
| State/Province | California |
| Major City | San Jose |
| Time Zone | Pacific (UTC-08:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 650-263 | San Mateo | Moss Beach, CA | Mci Worldcom Communications, Ca |
| 650-264 | San Mateo | San Carlos, CA | AT&T Local |
| 650-265 | Santa Clara | Mountain View, CA | AT&T Local |
| 650-266 | San Mateo | San Bruno, CA | Pacific Bell |
| 650-267 | San Francisco | San Francisco, CA | Level 3 Communications |
| 650-268 | San Mateo | Pescadero, CA | Xo California |
| 650-269 | Santa Clara | Palo Alto, CA | Cellco Partnership DBA Verizon Wireless |
| 650-270 | San Mateo | San Bruno, CA | Sprint Spectrum L.p. |
| 650-271 | San Francisco | San Francisco, CA | Metro PCS |
| 650-272 | Alameda | Fremont, CA | Xo California |
| 650-273 | San Mateo | San Bruno, CA | Astound Broadband |
| 650-274 | San Mateo | Brisbane, CA | Sprint Spectrum L.p. |
| 650-275 | San Mateo | Woodside, CA | Xo California |
| 650-276 | San Mateo | Half Moon Bay, CA | Tw Telecom Of California Lp |
| 650-277 | San Mateo | Redwood City, CA | 33 Wireless Inc. |
| 650-278 | San Mateo | San Mateo, CA | T-mobile Usa |
| 650-279 | Santa Clara | Mountain View, CA | Cellco Partnership DBA Verizon Wireless |
| 650-280 | Santa Clara | Mountain View, CA | Sprint Spectrum L.p. |
| 650-281 | San Mateo | Brisbane, CA | Sprint Spectrum L.p. |
| 650-282 | Santa Clara | Mountain View, CA | Astound Broadband |
There are 597 prefixes, In the code area, the major cities are Belmont, CA;Burlingame, CA;Daly City, CA;East Palo. The major city is San Jose.