Area code 650 is a telephone area code in the North American Numbering Plan (NANP) for the San Francisco Bay Area in the U.S. state of California. It was split from area code 415 on August 2, 1997, and includes most of San Mateo County (except the northernmost portion), part of San Francisco, and the northwestern portion of Santa Clara County including Palo Alto, Mountain View, and Los Altos.
Prior to October 2021, area code 650 had telephone numbers assigned for the central office code 988. In 2020, 988 was designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which created a conflict for exchanges that permit seven-digit dialing. This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021. 
The San Francisco Peninsula is a peninsula in the San Francisco Bay Area that separates San Francisco Bay from the Pacific Ocean. On its northern tip is the City and County of San Francisco. Its southern base is Mountain View, south of Palo Alto and north of Sunnyvale and Los Altos. Most of the Peninsula is occupied by San Mateo County, between San Francisco and Santa Clara counties, and including the cities and towns of Atherton, Belmont, Brisbane, Burlingame, Colma, Daly City, East Palo Alto, El Granada, Foster City, Hillsborough, Half Moon Bay, La Honda, Loma Mar, Los Altos, Menlo Park, Millbrae, Pacifica, Palo Alto, Pescadero, Portola Valley, Redwood City, San Bruno, San Carlos, San Mateo, South San Francisco, and Woodside.
Area codes 415 and 628 are telephone area codes in the North American Numbering Plan (NANP) for the city of San Francisco and its northern suburbs in Marin County, and the northeast corner of San Mateo County in the U.S. state of California. Area code 415 was one of the eighty-six original North American area codes established in 1947, but modified in geographic configuration later. Area code 628 was assigned in 2015 to form an overlay in that numbering plan area in mitigation of central office prefix exhaustion.
Area code 218 is a telephone area code in the North American Numbering Plan (NANP) for the northern part of the U.S. state of Minnesota. It is assigned to the largest of Minnesota's original two numbering plan areas (NPAs), although its geographical boundaries have been modified since inception. It comprises roughly the northern half of the state, and includes the cities of Duluth, Hibbing, Brainerd, Bemidji, Fergus Falls, and Moorhead.
Area codes 708 and 464 are telephone area codes in the North American Numbering Plan (NANP) for the southern and western suburbs of Chicago in the U.S. state of Illinois. The numbering plan area comprises most of western and southern Cook County, and eastern and southern Will County.
Area code 562 is a California telephone area code that was split from area code 310 on January 25, 1997. It is the area code for much of southeastern Los Angeles County, including Long Beach, and parts of northern Orange County.
Area code 626 is a telephone area code that was split from area code 818 in the U.S. state of California, on June 14, 1997. It covers most of the San Gabriel Valley and nearby areas in the northeastern portion of Los Angeles County, California, U.S., including Arcadia, Monrovia, El Monte, most of Pasadena and West Covina.
North American area code 928 is a telephone area code in the state of Arizona that was created in a split from area code 520 on June 23, 2001, due mainly to population gains in Tucson, Yuma and Flagstaff. 928 covers northern, eastern, and western portions of Arizona. The area code encompasses areas such as Beaver Dam, the Grand Canyon, Flagstaff, Holbrook, Lake Havasu City, Littlefield, Kingman, Prescott, Sedona, Wickenburg, Winslow and Yuma, also serving the majority of Greenlee County. The Arizona portion of the Navajo Nation is served by the 928 area code. Some areas on the western and northern fringes of the Phoenix metropolitan area, such as Lake Pleasant Regional Park in Peoria, also fall within this area code.
Area codes 910 and 472 are telephone area codes in the North American Numbering Plan (NANP) for southeastern North Carolina. The area codes form an overlay for a numbering plan area (NPA) that includes the cities of Wilmington, Jacksonville, Laurinburg, Lumberton and Fayetteville. Area code 910 was established in 1993, and 472 was added to the same area in 2022.
Area code 906 is the telephone area code in the North American Numbering Plan (NANP) for the Upper Peninsula of Michigan.
Area code 925 is a telephone area code that was split from area code 510 in the U.S. state of California, on March 14, 1998. It covers the inland portions of the East Bay counties of Alameda and Contra Costa in the northern area of California.
Area codes 209 and 350 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California. Their service area includes Stockton, Modesto, Turlock, Merced, Winton, Atwater, Livingston, Manteca, Ripon, Tracy, Lodi, Galt, Sonora, Los Banos, San Andreas, Mariposa, and Yosemite, the northern San Joaquin Valley, and the Sierra Foothills.
Area code 530 is a California telephone area code in northeastern and Northern California.
Area code 707 is a telephone area code in the North American Numbering Plan (NANP) for the northwestern part of the U.S. state of California. It was created by a split of area code 415 on March 1, 1959. It serves part of the northern San Francisco Bay Area, as well as the North Coast. Major cities in the area code include Napa, Sebastopol, Vallejo, Benicia, Fairfield, Santa Rosa, Windsor, Healdsburg, Rohnert Park, Petaluma, Fort Bragg, Rio Vista, Crescent City, Eureka, Clearlake, Vacaville, Dixon, and Ukiah.
North American area code 607 is a state of New York telephone area code servicing parts of its Southern Tier. It was created in 1954 by combining the southern portion of 315 and the eastern portion of 716. Initially, in the late 1940s, area codes with a middle digit of "0" (x0x-xxx-xxxx) were assigned only to jurisdictions covering an entire state. Along with 507 in Minnesota and 606 in Kentucky, 607 was among the first such area codes to be added to a jurisdiction.
Area code 830 is the telephone area code in the North American Numbering Plan (NANP) for the Texas Hill Country and most of San Antonio's suburbs. It completely surrounds area codes 210 and 726, which serve most of San Antonio itself along with its innermost suburbs.
North American area code 915 is a state of Texas area code for telephone numbers in the El Paso area. It is one of the original area codes established in October 1947. Originally, it covered the north-western part of the state, north of Austin and west of Fort Worth, and stretched from the Oklahoma border to the Mexican border.
Area code 940 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Texas in the Wichita Falls and Denton areas. It was created on July 7, 1997, in a split from area code 817.
Area code 319 is a telephone area code in the North American Numbering Plan (NANP) for the southeastern and east-central parts of the U.S. state of Iowa.
Area code 515 is a telephone area code in the North American Numbering Plan (NANP) for most of the north-central part of the U.S. state of Iowa. The numbering plan area includes Des Moines, Ames, Ankeny, Humboldt, Boone, Fort Dodge, Jefferson, Johnston, Urbandale, Algona and Indianola.
Area code 417 is a telephone area code in the North American Numbering Plan (NANP) for the southwestern quadrant of Missouri, including the cities of Branson, Carl Junction, Carthage, Joplin, Lebanon, Neosho, Nixa, Ozark, Springfield, and West Plains. Area code 417 was created in 1951 as a split from area code 816.
|West: Pacific Ocean, 808||area code 650||East: 510/341, 925|
|South: 408/669, 831|
|Hawaii area codes: 808|
Coordinates: 37°30′N122°18′W / 37.5°N 122.3°W