North American area code 650 is a California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

 telephone

Telephone

The telephone , colloquially referred to as a phone, is a telecommunications device that transmits and receives sounds, usually the human voice. Telephones are a point-to-point communication system whose most basic function is to allow two people separated by large distances to talk to each other...

 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, 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 County

Santa Clara County, California

Santa 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 2010 it had a population of 1,781,642. The county seat is San Jose. The highly urbanized Santa Clara Valley within Santa Clara County is also known as Silicon Valley...

 including Palo Alto

Palo Alto, California

Palo Alto is a California charter city located in the northwest corner of Santa Clara County, in the San Francisco Bay Area of California, United States. The city shares its borders with East Palo Alto, Mountain View, Los Altos, Los Altos Hills, Stanford, Portola Valley, and Menlo Park. It is...

, Mountain View

Mountain View, California

-Downtown:Mountain View has a pedestrian-friendly downtown centered on Castro Street. The downtown area consists of the seven blocks of Castro Street from the Downtown Mountain View Station transit center in the north to the intersection with El Camino Real in the south...

, and Los Altos

Los Altos, California

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 28,976 according to the 2010 census....

.

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

Area code 415

North American Area code 415 is the Californian telephone area code for San Francisco and its northern suburbs .-History:415 was one of the original three area codes in California, established in 1947...

. 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 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, and north of Santa Clara County. San Francisco International Airport is located at the northern end of the county, and...

• Atherton
  Atherton, California
  Atherton is an incorporated town in San Mateo County, California, United States. Its population was 6,914 at the 2010 census. In September 2010, Forbes magazine placed Atherton's zip code of 94027 at #2 on its annual list of America's most expensive zip codes, with a median home price of $4,010,200...
  
  
• Belmont
  Belmont, California
  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, California
  Broadmoor is a census-designated place in an unincorporated area of San Mateo County, California, United States. The enclave is entirely surrounded by Daly City...
  
  
• Burlingame
  Burlingame, California
  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 its many surviving examples of Victorian architecture, its affluence, and...
  
  
• 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. The population was 1,792 at the 2010 census. The town was founded as a necropolis in 1924....
  
  
• Daly City
  Daly City, California
  Daly City is the largest city in San Mateo County, California, United States, with a 2010 population of 101,123. Located immediately south of San Francisco, it is named in honor of businessman and landowner John Daly.-History:...
  
   (small portion in 415
  Area code 415
  North American Area code 415 is the Californian telephone area code for San Francisco and its northern suburbs .-History:415 was one of the original three area codes in California, established in 1947...
  
  )
• East Palo Alto
  East Palo Alto, California
  East Palo Alto is a city in San Mateo County, California, United States.-Overview:As of the 2010 census, the population of East Palo Alto was 28,155. It is situated on the San Francisco Peninsula, roughly halfway between the cities of San Francisco and San Jose...
  
  
• El Granada
  El Granada, California
  El Granada is a census-designated place in the coastal area of northern San Mateo County, California, United States. The population was 5,467 at the 2010 census.-Geography:...
  
  
• Emerald Lake Hills
  Emerald Lake Hills, California
  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, California
  Foster City is an affluent planned city located in San Mateo County, California, 94404. As of the 2010 census, the city had a total population of 30,567. Forbes ranked Foster City #10 on their 2009 list of America's Top 25 Towns to Live Well. Money has also recognized Foster City multiple times as...
  
  
• Half Moon Bay
  Half Moon Bay, California
  Half Moon Bay is a coastal city in San Mateo County, California, USA. Its population was 11,324 as of the 2010 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
  Highlands-Baywood Park, California
  Highlands-Baywood Park is a census-designated place in San Mateo County, California, United States. The population was 4,027 at the 2010 census.-Geography:Highlands-Baywood Park is located at ....
  
  
• Hillsborough
  Hillsborough, California
  Hillsborough is an incorporated town in San Mateo County, California, in the San Francisco Bay Area. Hillsborough is one of the wealthiest communities in America and has the highest income of places in the United States with populations of at least 10,000...
  
  
• Kings Mountain
  Kings Mountain, California
  Kings Mountain is an unincorporated community in San Mateo County, California, 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, California
  La Honda is a census-designated place in southern San Mateo County, California, United States. The population was 928 at the 2010 census. It is located in the Santa Cruz Mountains between Silicon Valley and the Pacific coast of California...
  
  
• Ladera
  Ladera, California
  Ladera is a census-designated place located in southern San Mateo County, California adjacent to Portola Valley. Primarily a residential community, it comprises approximately 520 homes. The ZIP Code is 94028 and the community is inside area code 650...
  
  
• Loma Mar
  Loma Mar, California
  Loma Mar is a census-designated place in San Mateo County, California. 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 2010, there are an estimated 113 residents in the CDP...
  
  
• 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. 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, California
  Menlo Park, California is a city at the eastern edge of San Mateo County, in the San Francisco Bay Area of California, in the United States. It is bordered by San Francisco Bay on the north and east; East Palo Alto, Palo Alto, and Stanford to the south; Atherton, North Fair Oaks, and Redwood City...
  
  
• Middleton Tract
  Middleton Tract, California
  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, California
  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 21,532 at the 2010 census.-History:...
  
  
• Montara
  Montara, California
  Montara is a census-designated place in San Mateo County, California, United States. The population was 2,909 at the 2010 census. Nearby communities include Moss Beach and Princeton-by-the-Sea.-Geography and environment:...
  
  
• Moss Beach
  Moss Beach, California
  Moss Beach is a coastal census-designated place in San Mateo County, California, with a year 2010 census population of 3,103. Located in Moss Beach are the Fitzgerald Marine Reserve, a marine sanctuary; the Half Moon Bay Airport, the historic Moss Beach Distillery and the Seal Cove Inn, a...
  
  
• 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 adjacent to Redwood City, Atherton, and Menlo Park. As of the 2010 census the area had a total population of 14,687. Because of the large number of...
  
  
• 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.-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, California
  Pescadero is a census-designated place 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. The ZIP Code is 94060 and...
  
  
• Portola Valley
  Portola Valley, California
  Portola Valley is an incorporated town in San Mateo County, California, United States. The population was 4,353 at the 2010 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, 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.-Profile:...
  
  
• Redwood City
  Redwood City, California
  Redwood City is a California charter city located on the San Francisco Peninsula in Northern California, approximately 27 miles south of San Francisco, and 24 miles north of San Jose. Redwood City's history spans from its earliest inhabitation by the Ohlone people, to its tradition as a port for...
  
  
• San Bruno
  San Bruno, California
  San Bruno is a city in San Mateo County, California, United States. The population was 41,114 at the 2010 census.The city is adjacent to San Francisco International Airport and Golden Gate National Cemetery.-Geography:San Bruno is located at...
  
  
• San Carlos
  San Carlos, California
  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 Carlos' ZIP code is 94070, and it is within...
  
  
• San Gregorio
  San Gregorio, California
  -History:Named after Pope Gregory I , San Gregorio was a booming town in the 1850s, when wealthy San Franciscans would travel to the San Gregorio House by stagecoach to enjoy fishing, hunting, sea bathing, and boat races. The building still stands, but is no longer a functioning hotel. However, the...
  
  
• San Mateo
  San Mateo, California
  San Mateo is a city in San Mateo County, California, United States, in the San Francisco Bay Area. With a population of approximately 100,000 , it is one of the larger suburbs on the San Francisco Peninsula, located between Burlingame to the north, Foster City to the east, Belmont to the south,...
  
  
• Sky Londa
  Sky Londa, California
  Sky Londa is an unincorporated mountain community in San Mateo County, California located at the intersection of State Route 84 and State Route 35...
  
  
• South San Francisco
  South San Francisco, California
  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, California
  West Menlo Park is a census-designated place and an unincorporated area in San Mateo County, California, locatedbetween the majority of City of Menlo Park, the Town of Atherton, the Sharon Heights neighborhood of Menlo Park and Stanford University...
  
  
• Woodside
  Woodside, California
  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. The U.S. Census estimated the population of the town to be 5,287 in 2010....
  
  

Santa Clara County

Santa Clara County, California

Santa 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 2010 it had a population of 1,781,642. The county seat is San Jose. The highly urbanized Santa Clara Valley within Santa Clara County is also known as Silicon Valley...

• Los Altos
  Los Altos, California
  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 28,976 according to the 2010 census....
  
  
• Los Altos Hills
  Los Altos Hills, California
  Los Altos Hills is an incorporated town in Santa Clara County, California, United States. The population was 7,922 at the 2010 census. Located in Silicon Valley, Los Altos Hills is one of the wealthiest cities in the nation.-Strictly residential:...
  
  
• Loyola
  Loyola, California
  Loyola is a census-designated place and an unincorporated town in Santa Clara County, California, United States. The population was 3,261 at the 2010 census. The area is located between the cities of Los Altos and Los Altos Hills...
  
  
• Mountain View
  Mountain View, California
  -Downtown:Mountain View has a pedestrian-friendly downtown centered on Castro Street. The downtown area consists of the seven blocks of Castro Street from the Downtown Mountain View Station transit center in the north to the intersection with El Camino Real in the south...
  
  
• Palo Alto
  Palo Alto, California
  Palo Alto is a California charter city located in the northwest corner of Santa Clara County, in the San Francisco Bay Area of California, United States. The city shares its borders with East Palo Alto, Mountain View, Los Altos, Los Altos Hills, Stanford, Portola Valley, and Menlo Park. It is...
  
  
• Stanford
  Stanford, California
  Stanford is a census-designated place in Santa Clara County, California, United States and is the home of Stanford University. The population was 13,809 at the 2010 census....
  
  

External links

• List of exchanges from AreaCodeDownload.com, 650 Area Code