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Area code 650
 
 
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North American area code 650 is a California
California

California is a U.S. state on the West Coast of the United States of the United States, along the Pacific Ocean. It is bordered by Oregon to the north, Nevada to the east, Arizona to the southeast, and to the south the Mexico state of Baja California....
 telephone
Telephone

The telephone is a telecommunications device that is used to transmitter and receive electronically or digitally encoded sound between two or more people conversing....
 area code which includes most of San Mateo County
San Mateo County, California

San Mateo County is a county located in the San Francisco Bay Area of the U.S. state of California. It covers most of the San Francisco Peninsula just south of San Francisco, California, and north of Santa Clara County, California....
 (except the northernmost portion) and the extreme northwestern portion of Santa Clara County
Santa Clara County, California

Santa Clara County is a county located in the San Francisco Bay Area of the U.S. state of California. As of 2000 it had a population of 1,682,585....
 including Palo Alto
Palo Alto, California

Palo Alto is a California charter city located in the northwest corner of Santa Clara County, California, in the San Francisco Bay Area of California, United States....
, Mountain View
Mountain View, California

Mountain View is a city in Santa Clara County, California, in the U.S. state of California. The city gets its name from the views of the Santa Cruz Mountains....
, and Los Altos
Los Altos, California

Los Altos is a town at the southern end of the San Francisco Peninsula, in the San Francisco Bay Area. The city is in Santa Clara County, California, California, United States....
.

The 650 area was created by a split from area code 415
Area code 415

Area code 415 is the telephone area code for San Francisco, California, as well as portions of neighboring Brisbane, California and Daly City, California; and Marin County , in the state of California, USA....
. A six month "permissive dialing" period when either area code would work began August 2, 1997.






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Area Code 650
North American area code 650 is a California
California

California is a U.S. state on the West Coast of the United States of the United States, along the Pacific Ocean. It is bordered by Oregon to the north, Nevada to the east, Arizona to the southeast, and to the south the Mexico state of Baja California....
 telephone
Telephone

The telephone is a telecommunications device that is used to transmitter and receive electronically or digitally encoded sound between two or more people conversing....
 area code which includes most of San Mateo County
San Mateo County, California

San Mateo County is a county located in the San Francisco Bay Area of the U.S. state of California. It covers most of the San Francisco Peninsula just south of San Francisco, California, and north of Santa Clara County, California....
 (except the northernmost portion) and the extreme northwestern portion of Santa Clara County
Santa Clara County, California

Santa Clara County is a county located in the San Francisco Bay Area of the U.S. state of California. As of 2000 it had a population of 1,682,585....
 including Palo Alto
Palo Alto, California

Palo Alto is a California charter city located in the northwest corner of Santa Clara County, California, in the San Francisco Bay Area of California, United States....
, Mountain View
Mountain View, California

Mountain View is a city in Santa Clara County, California, in the U.S. state of California. The city gets its name from the views of the Santa Cruz Mountains....
, and Los Altos
Los Altos, California

Los Altos is a town at the southern end of the San Francisco Peninsula, in the San Francisco Bay Area. The city is in Santa Clara County, California, California, United States....
.

The 650 area was created by a split from area code 415
Area code 415

Area code 415 is the telephone area code for San Francisco, California, as well as portions of neighboring Brisbane, California and Daly City, California; and Marin County , in the state of California, USA....
. A six month "permissive dialing" period when either area code would work began August 2, 1997. Mandatory dialing of the new area code started on January 31, 1998.

Cities in the 650 area code


San Mateo County
San Mateo County, California

San Mateo County is a county located in the San Francisco Bay Area of the U.S. state of California. It covers most of the San Francisco Peninsula just south of San Francisco, California, and north of Santa Clara County, California....

  • Atherton
    Atherton, California

    Atherton is an List of cities in California in San Mateo County, California, California, United States. Its population was 7,194 at the 2000 census....
  • Belmont
    Belmont, California

    Belmont is a city in San Mateo County, California, California, United States. It is in the San Francisco Bay Area, located half-way down the San Francisco Peninsula between San Mateo, California and San Carlos, California....
  • Broadmoor
    Broadmoor, California

    Broadmoor is a census-designated place in San Mateo County, California, California, United States. The population was 4,026 at the 2000 census....
  • Burlingame
    Burlingame, California

    Burlingame is a city in San Mateo County, California, California. It is located on the San Francisco Peninsula and has a significant shoreline on San Francisco Bay....
  • Colma
    Colma, California

    Colma is a small incorporated town in San Mateo County, California, at the northern end of the San Francisco Peninsula in the San Francisco Bay Area....
  • Daly City
    Daly City, California

    Daly City is a city in San Mateo County, California, United States, with a 2000 population of 103,621. It is named in honor of businessman and landowner, John Donald Daly....
     (small portion in 415
    Area code 415

    Area code 415 is the telephone area code for San Francisco, California, as well as portions of neighboring Brisbane, California and Daly City, California; and Marin County , in the state of California, USA....
    )
  • East Palo Alto
    East Palo Alto, California

    East Palo Alto is a city in San Mateo County, California, California, United States....
  • El Granada
    El Granada, California

    El Granada is a census-designated place in the coastal area of northern San Mateo County, California, California, United States. The population was 5,724 at the 2000 census....
  • Emerald Lake Hills
    Emerald Lake Hills, California

    Emerald Lake Hills is a census-designated place and neighborhood in unincorporated San Mateo County, California, in the U.S. state of California, United States....
  • Foster City
    Foster City, California

    Foster City is an affluent planned city located in San Mateo County, California, 94404. As of the 2000 census, the city had a total population of 28,803....
  • Half Moon Bay
    Half Moon Bay, California

    Half Moon Bay is a coastal city in San Mateo County, California County, California, United States. Its population was 11,842 as of the 2000 census....
  • Highlands-Baywood Park
    Highlands-Baywood Park, California

    Baywood Park is a quite wealthy census-designated place in San Mateo County, California, California, United States. The population was 4,210 at the 2000 census....
  • Hillsborough
    Hillsborough, California

    Hillsborough is an List of cities in California in San Mateo County, California, California, in the San Francisco Bay Area. Hillsborough is one of the wealthiest places in America and has the highest income of places in America with populations of at least 10,000....
  • Kings Mountain
    Kings Mountain, California

    Kings Mountain, an unincorporated community in San Mateo County, California, is located along California State Route 35 between Skeggs Point, California and Pise Mountain....
  • La Honda
    La Honda, California

    La Honda is a small unincorporated area town in San Mateo County in the state of California. It is located in the Santa Cruz Mountains between Silicon Valley and the Pacific coast of California, western United States....
  • Ladera
    Ladera, California

    Ladera is an unincorporated area community located in San Mateo County, California adjacent to Portola Valley, California. Primarily a residential community, it comprises approximately 520 homes with about 2,000 residents....
  • Loma Mar
    Loma Mar, California

    Loma Mar is a small unincorporated area community in San Mateo County, California, California. It is located at . It is near San Mateo County Memorial Park on Pescadero Road and is in area code 650....
  • Los Trancos Woods
    Los Trancos Woods, California

    Los Trancos Woods is an unincorporated community in San Mateo County, California near the border of Santa Clara County, California. The US Geological Survey, National Geographic Names Database, show it as a feature type populated place. The area does not have its own unique ZIP code; it is in ZIP code 94028 and area code 650....
  • Menlo Park
    Menlo Park, California

    Menlo Park is an affluent city in San Mateo County, California, in the San Francisco Bay Area of California. It is located at latitude 37?29' North, longitude 122?9' East....
  • Middleton Tract
    Middleton Tract, California

    Middleton Tract is a rural community in the coastal Redwoods of San Mateo County, California, California. Unattributed press reports say the name Middleton Tract may have been applied to this area as early as 1925....
  • Millbrae
    Millbrae, California

    Millbrae is a city in San Mateo County, California, California, United States, just west of San Francisco Bay, with San Bruno on the north and Burlingame, California on the south....
  • Montara
    Montara, California

    Montara is a census-designated place in San Mateo County, California, California, United States. The population was 2,950 at the 2000 census....
  • Moss Beach
    Moss Beach, California

    Moss Beach is a coastal census-designated place in San Mateo County, California, with a year 2000 census population of 1953. Located in Moss Beach are the Fitzgerald Marine Reserve, a marine sanctuary; the historic Moss Beach Distillery and the Seal Cove Inn, a destination lodging property....
  • North Fair Oaks
    North Fair Oaks, California

    North Fair Oaks is a census-designated place and district for the purposes of the United States census in an unincorporated area of San Mateo County, California adjacent to Redwood City, California, Atherton, California, and Menlo Park, California....
  • Pacifica
    Pacifica, California

    Pacifica is a city in San Mateo County, California, on the coast of the Pacific Ocean between San Francisco and Half Moon Bay, California. According to City limits signs in the year 2006, the population was 40,401....
  • Pescadero
    Pescadero, California

    Pescadero is an unincorporated community in San Mateo County, California two miles east of State Route 1 and Pescadero State Beach. The center of town, on Pescadero Creek Road, is located at latitude 37.255 and longitude 122.38028....
  • Portola Valley
    Portola Valley, California

    Portola Valley is an List of cities in California in San Mateo County, California, California, United States. The population was 4,462 at the 2000 census....
  • Princeton-by-the-Sea
    Princeton-by-the-Sea, California

    Princeton-by-the-Sea is an unincorporated community on the coast of San Mateo County, California. The ZIP Code is 94019 and the community is inside area code 650....
  • Redwood City
    Redwood City, California

    Redwood City is a suburb located on the San Francisco Peninsula in the San Francisco Bay Area of California. Redwood City is the county seat of San Mateo County, California....
  • San Bruno
    San Bruno, California

    San Bruno is a city in San Mateo County, California, California, United States. The population was 40,165 at the 2000 census.The city essentially includes San Francisco International Airport and Golden Gate National Cemetery....
  • San Carlos
    San Carlos, California

    San Carlos is a city in San Mateo County, California, California, USA on the San Francisco Peninsula, about halfway between San Francisco and San Jose, California....
  • San Gregorio
    San Gregorio, California

    San Gregorio is an unincorporated community in San Mateo County, California, with a population of 287 people. It is located in the San Francisco Bay Area, south of Half Moon Bay, California....
  • San Mateo
    San Mateo, California

    San Mateo is a city in San Mateo County, California, California, United States, in the San Francisco Bay Area. It is one of the larger suburbs on the San Francisco Peninsula, located between Burlingame, California to the north, Foster City, California to the east, and Belmont, California to the south....
  • Sky Londa
    Sky Londa, California

    Sky Londa is an unincorporated area mountain community in San Mateo County, California located at the intersection of California State Route 84 and California State Route 35....
  • West Menlo Park
    West Menlo Park, California

    West Menlo Park is a census-designated place and an unincorporated community in San Mateo County, California,inside of Menlo Park, California, and adjacent to Atherton, California, Sharon Heights and Stanford University....
  • Woodside
    Woodside, California

    Woodside is a small List of cities in California in San Mateo County, California, California, United States, on the San Francisco Peninsula. It uses a council-manager government....


Santa Clara County
Santa Clara County, California

Santa Clara County is a county located in the San Francisco Bay Area of the U.S. state of California. As of 2000 it had a population of 1,682,585....

  • Los Altos
    Los Altos, California

    Los Altos is a town at the southern end of the San Francisco Peninsula, in the San Francisco Bay Area. The city is in Santa Clara County, California, California, United States....
  • Los Altos Hills
    Los Altos Hills, California

    Los Altos Hills is an List of cities in California in Santa Clara County, California, California, United States. The population was 7,902 at the 2000 census....
  • Loyola
    Loyola, California

    Loyola is a census-designated place and an unincorporated town in Santa Clara County, California, California, United States. The population was 3,478 at the 2000 census....
  • Mountain View
    Mountain View, California

    Mountain View is a city in Santa Clara County, California, in the U.S. state of California. The city gets its name from the views of the Santa Cruz Mountains....
  • Palo Alto
    Palo Alto, California

    Palo Alto is a California charter city located in the northwest corner of Santa Clara County, California, in the San Francisco Bay Area of California, United States....
  • Stanford
    Stanford, California

    Stanford is a census-designated place in Santa Clara County, California, California, United States. The population was 13,315 at the United States Census, 2000...


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