Area code 650

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Map of California area codes in blue (and border states) with 650 in red
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Map of California area codes in blue (and border states) with 650 in red

North American area code 650 is a California telephone area code which includes most of San Mateo County (except the northernmost portion) and the extreme northwestern portion of Santa Clara County including Palo Alto.

The 650 area was created by moving prefixes out of the 415 area code. A six month "permissive dialing" period where either area code would work began August 2, 1997. Mandatory dialing of the new area code started on January 31, 1998.

[edit] See also


State of California Area Codes: 209, 213, 310, 323, 408, 415, 424, 510, 530, 559, 562, 619, 626, 650, 661, 707, 714, 760, 805, 818, 831, 858, 909, 916, 925, 949, 951
North: 415
West: Pacific Ocean, 808 area code 650 East: 510
South: 408, 831
State of Hawaii Area Code: 808