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North American
area code 650 is a
CaliforniaCalifornia is the most populous state in the United States, and the third largest by area. California is the second most populous sub-national entity in the Americas, behind only São Paulo, Brazil...
telephoneThe telephone is a telecommunications device that transmits and receives sound, most commonly the human voice. It is one of the most common household appliances in the developed world, and has long been considered indispensable to business, industry and government...
area code which includes most of
San Mateo CountySan 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, and north of Santa Clara County. San Francisco International Airport is located at the northern end of the county, and...
(except the northernmost portion) and the extreme northwestern portion of
Santa Clara CountySanta Clara County is a county located at the southern end of the San Francisco Bay Area in the U.S. state of California. As of 2000 it had a population of 1,682,585. The U.S. Census estimate for 2008 was 1,764,499. The county seat is San Jose. The highly urbanized Santa Clara Valley within Santa...
including
Palo AltoPalo Alto is a California charter city located in the northwest corner of Santa Clara County, in the San Francisco Bay Area of California, USA. It is named after a tree called El Palo Alto...
,
Mountain ViewMountain View is a city in Santa Clara County, in the U.S. state of California. The city gets its name from the views of the Santa Cruz Mountains. As of the 2000 census, the city had a total population of 70,708.-Geography:...
, and
Los AltosLos Altos is a city at the southern end of the San Francisco Peninsula, in the San Francisco Bay Area. The city is in Santa Clara County, California, United States. The population was 27,693 according to the 2000 census. It is one of the wealthiest places in the United States.Most of the city's...
.
The 650 area was created by a split from
area code 415Area code 415 is the telephone area code for San Francisco, as well as portions of neighboring Brisbane and Daly City; and Marin County , in the state of California, USA.-History:...
. 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.
San Mateo CountySan 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, and north of Santa Clara County. San Francisco International Airport is located at the northern end of the county, and...
- Atherton
Atherton is an incorporated town in San Mateo County, California, United States. Its population was 7,194 at the 2000 census. It is one of the wealthiest cities in the United States.- History :...
- Belmont
Belmont is a city in San Mateo County, California, United States. It is in the San Francisco Bay Area, located half-way down the San Francisco Peninsula between San Mateo and San Carlos. It was originally part of the Rancho de las Pulgas, for which one of its main roads, the Alameda de las Pulgas,...
- Broadmoor
Broadmoor is a census-designated place in an unincorporated area of San Mateo County, California, United States. The population was 4,026 at the 2000 census.-Geography:Broadmoor is located at ....
- Burlingame
Burlingame is a city in San Mateo County, California. It is located on the San Francisco Peninsula and has a significant shoreline on San Francisco Bay. The city is named after diplomat Anson Burlingame. It is renowned for many surviving examples of Victorian architecture and its high residential...
- Colma
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. The population was 1,191 at the 2000 census...
- Daly City
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 Daly.-History:...
(small portion in 415Area code 415 is the telephone area code for San Francisco, as well as portions of neighboring Brisbane and Daly City; and Marin County , in the state of California, USA.-History:...
)
- East Palo Alto
East Palo Alto is a city in San Mateo County, California, United States.-Overview:As of the 2000 census, the population of East Palo Alto was 29,506 . It is situated on the San Francisco Peninsula, roughly halfway between the cities of San Francisco and San Jose...
- El Granada
El Granada is a census-designated place in the coastal area of northern San Mateo County, California, United States. The population was 5,724 at the 2000 census.-Geography:...
- Emerald Lake Hills
Emerald Lake Hills is a census-designated place and neighborhood in unincorporated San Mateo County, in the state of California, USA. Situated among oak-studded hills between Woodside, Redwood City, and San Carlos roughly bounded by Edgewood Road, Alameda de las Pulgas, Farm Hill Boulevard, and...
- Foster City
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 is a coastal city in San Mateo County, California, USA. Its population was 11,842 as of the 2000 census. Immediately at the north of Half Moon Bay is the Pillar Point Harbor and the unincorporated community of Princeton-by-the-Sea....
- Highlands-Baywood Park
Baywood Park is a census-designated place in San Mateo County, California, United States. The population was 4,210 at the 2000 census.-Geography:Baywood Park is located at ....
- Hillsborough
Hillsborough is an incorporated town in San Mateo County, 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. It is located seventeen miles south of San Francisco on...
- Kings Mountain
Kings Mountain, an unincorporated community in San Mateo County, California, is located along State Route 35 between Skeggs Point and Pise Mountain. This is about seven miles north of Woodside Road . In the U.S...
- La Honda
La Honda is a small unincorporated 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. The population of the Cuesta La Honda subdivision is approximately 1,500, with a...
- Ladera
Ladera is an unincorporated community located in San Mateo County, California adjacent to Portola Valley. Primarily a residential community, it comprises approximately 520 homes with about 2,000 residents...
- Loma Mar
Loma Mar is a small unincorporated community in San Mateo County, California. It is located at . It is near San Mateo County Memorial Park on Pescadero Road and is in area code 650. The United States Postal Service has assigned it ZIP Code 94021. As of the census of 2000, there are an estimated 170...
- Los Trancos Woods
Los Trancos Woods is an unincorporated community in San Mateo County, California near the border of Santa Clara County. 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...
- Menlo Park
Menlo Park is an affluent city in San Mateo County, in the San Francisco Bay Area of California. It is located at latitude 37°29' North, longitude 122°9' East. Menlo Park had 29,964 inhabitants as of the 2007 U.S. Census.-History:...
- Middleton Tract
Middleton Tract is a rural community in the coastal Redwoods of San Mateo County, California. Unattributed press reports say the name Middleton Tract may have been applied to this area as early as 1925. In the present day, the name is official at the county government level...
- Millbrae
Millbrae is a city in San Mateo County, California, United States, just west of San Francisco Bay, with San Bruno on the north and Burlingame on the south. The population was 20,718 at the 2000 census.-History:...
- Montara
Montara is a census-designated place in San Mateo County, California, United States. The population was 2,950 at the 2000 census. Nearby communities include Moss Beach and Princeton-by-the-Sea.-Geography and environment:...
- Moss Beach
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 is a census-designated place and district for the purposes of the United States census in an unincorporated area of San Mateo County adjacent to Redwood City, Atherton, and Menlo Park. As of the 2000 census the area had a total population of 15,440. Because of the large number of...
- Pacifica
Pacifica is a city in San Mateo County, California, on the coast of the Pacific Ocean between San Francisco and Half Moon Bay.-Overview:The City of Pacifica is spread along a six mile stretch of the north central California coastal beach and hills, nestled in several small valleys spanning between...
- Pescadero
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. The town is south of Half Moon Bay...
- Portola Valley
Portola Valley is an incorporated town in San Mateo County, California, United States. The population was 4,462 at the 2000 census. It was named for Spanish explorer Gaspar de Portola, who led the first party of Europeans to explore the San Francisco Peninsula, in 1769.Portola Valley is one of the...
- Princeton-by-the-Sea
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.-Profile:...
- Redwood City
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. It was originally part of the Rancho de las Pulgas. As of the 2006 census, the city had a total population of 79,000...
- San Bruno
San Bruno is a city in San Mateo County, California, United States. The population was 40,165 at the 2000 census.The city is adjacent to, but does not include San Francisco International Airport and Golden Gate National Cemetery .-Geography:San Bruno is located at...
- San Carlos
San Carlos is a city in San Mateo County, California, USA on the San Francisco Peninsula, about halfway between San Francisco and San Jose. It is an affluent small residential suburb located between Belmont to the north and Redwood City to the south...
- San Gregorio
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...
- San Mateo
San Mateo is a city in San Mateo County, California, United States, in the San Francisco Bay Area. It is one of the larger suburbs on the San Francisco Peninsula, located between Burlingame to the north, Foster City to the east, and Belmont to the south...
- Sky Londa
Sky Londa is an unincorporated mountain community in San Mateo County, California located at the intersection of State Route 84 and State Route 35 . The community is inside area code 650 and ZIP code 94062....
- South San Francisco
South San Francisco is a city in San Mateo County, California, United States, located on the San Francisco Peninsula in the San Francisco Bay Area...
- West Menlo Park
West Menlo Park is a census-designated place and an unincorporated community in San Mateo County, California, locatedbetween the City of Menlo Park, the Town of Atherton, Sharon Heights neighborhood and Stanford University...
- Woodside
Woodside is a small incorporated town in San Mateo County, California, United States, on the San Francisco Peninsula. It uses a council-manager system of government.Woodside is among the wealthiest communities in the world....
Santa Clara CountySanta Clara County is a county located at the southern end of the San Francisco Bay Area in the U.S. state of California. As of 2000 it had a population of 1,682,585. The U.S. Census estimate for 2008 was 1,764,499. The county seat is San Jose. The highly urbanized Santa Clara Valley within Santa...
- Los Altos
Los Altos is a city at the southern end of the San Francisco Peninsula, in the San Francisco Bay Area. The city is in Santa Clara County, California, United States. The population was 27,693 according to the 2000 census. It is one of the wealthiest places in the United States.Most of the city's...
- Los Altos Hills
Los Altos Hills is an incorporated town in Santa Clara County, California, United States. The population was 7,902 at the 2000 census. It is one of the wealthiest places in the United States.-Strictly Residential:...
- Loyola
Loyola is a census-designated place and an unincorporated town in Santa Clara County, California, United States. The population was 3,478 at the 2000 census. The area is located between the cities of Los Altos and Los Altos Hills...
- Mountain View
Mountain View is a city in Santa Clara County, in the U.S. state of California. The city gets its name from the views of the Santa Cruz Mountains. As of the 2000 census, the city had a total population of 70,708.-Geography:...
- Palo Alto
Palo Alto is a California charter city located in the northwest corner of Santa Clara County, in the San Francisco Bay Area of California, USA. It is named after a tree called El Palo Alto...
- Stanford
Stanford is a census-designated place in Santa Clara County, California, United States. The population was 13,315 at the 2000 census. Stanford is an unincorporated area of Santa Clara County and is adjacent to the city of Palo Alto. Stanford, California is a valid postal address, and has its own...
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