Area Code 415

Area Code 415 is in California

Other California Area Codes
209, 213, 279, 310, 323, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 628, 650, 657, 661, 669, 707, 714, 747, 760, 805, 818, 831, 858, 909, 916, 925, 949, 951

California Area Code Overlays
(310 and 424) - (415 and 628)
(408 and 669) - (714 and 657)
(760 and 442) - (818 and 747)

Area Code 415 History:

Area code 415 was put into service. In 1959 area code 415 was split to form area codes 408 and 707. In 1991 area code 415 was split to form area code 510. In 1997 area code 415 was split to form area code 650.

On March 21, 2015 area code 628 was put into service as an overlay of area code 415. Effective February 21, 2015 ten digit dialing in the 628 and 415 area codes became mandatory.

Ten digit dialing (area code + seven digit number) is necessary in the 415/628 overlay because different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.

Counties in California within area code 415 include:

Marin County, and San Francisco County.

Major cities or places in California within area code 415 include:

Area code 415 serves the larger communities of Novato, San Anselmo, San Francisco, and San Rafael, most of Marin County and all of San Francisco County.

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