Area codes 310 and 424 are telephone

area code A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, r ...

s in the

North American Numbering Plan The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the international calling ...

(NANP) for the U.S. state of

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. The numbering plan area includes the

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and South Bay areas of

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, a small portion of

Ventura County Ventura County () is a County (United States), county in Southern California, the southern part of the U.S. state of California. As of the 2020 United States Census, 2020 census, the population was 843,843. The largest city is Oxnard, California ...

, and Santa Catalina Island, which is located south. Area code 310 was created in a split from

area code 213 Area codes 213 and 323 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California. They are assigned to a numbering plan area (NPA) that comprises, roughly, the area of central Los Angeles, and includes ...

on November 2, 1991. On January 25, 1997, area code 310 was split, creating area code 562 for the southeast portion of Los Angeles County and a large portion of Orange County. Area code 424 was added to the remaining numbering plan area on July 26, 2006, in an

overlay plan Overlay may refer to: Computers * Overlay network, a computer network which is built on top of another network * Hardware overlay, one type of video overlay that uses memory dedicated to the application *Another term for exec, replacing one proce ...

, the first in California.

Splits and overlay controversy

Area code 562 was originally intended as an overlay code for cellular and

pager A pager (also known as a beeper or bleeper) is a wireless telecommunications device that receives and displays alphanumeric or voice messages. One-way pagers can only receive messages, while response pagers and two-way pagers can also acknow ...

services for the existing 310 area. The overlay was planned for late 1995, and was expected to extended over the 213 and 818 areas the following year. However, the plan was changed to a split of 310, when the California Public Utilities Commission decided that an overlay would have disadvantaged subscribers of smaller companies in requiring ten-digit dialing. The south and east portions of 310, roughly the Gateway Cities area of Los Angeles County from

Long Beach Long Beach is a city in Los Angeles County, California. It is the 42nd-most populous city in the United States, with a population of 466,742 as of 2020. A charter city, Long Beach is the seventh-most populous city in California. Incorporat ...

to Whittier and parts of Orange County became area code 562 on January 25, 1997. In lieu of executing an additional split, a new area code, 424, was implemented in the entire 310 region, first announced in early 1999. Previously, several proposals intended to split 310 at Imperial Highway, a major east–west thoroughfare that marks the southern boundary of

Los Angeles International Airport Los Angeles International Airport , commonly referred to as LAX (with each letter pronounced individually), is the primary international airport serving Los Angeles, California and its surrounding metropolitan area. LAX is located in the ...

. The South Bay below the boundary would have received area code 424. South Bay governments and businesses opposed such a move, since it would require costly changes to business cards, stationery, signage, and other business communications. Announcement of the 424 overlay created an uproar in Los Angeles's politically powerful Westside community, in part because the change would necessitate dialing ten digits even when calling local numbers. Championed by ''

Los Angeles Times The ''Los Angeles Times'' (abbreviated as ''LA Times'') is a daily newspaper that started publishing in Los Angeles in 1881. Based in the LA-adjacent suburb of El Segundo since 2018, it is the sixth-largest newspaper by circulation in the ...

'' columnist Robert Scheer in the paper's Santa Monica insert section, a protest movement arose in May 1999, focusing on the idea of telephone-number conservation. In a carry-over from the time of analog telephone systems, numbers were still assigned to telephone companies in blocks of 10,000, leading to a large portion of unused telephone numbers in each area code. Responding to the controversy, the

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passed the Consumer Area Code Relief Act of 1999 on September 9, 1999, and the 424 overlay was tabled. Having been staved off nearly seven years, the 424 overlay was finally implemented on July 26, 2006, and new telephone numbers issued in the 310 area code may now begin with either 310 or 424. On December 31, 2005, customers began dialing ''1 + area code + seven-digit number'' (cellphones can omit the "1") whenever a call is placed from the 310 area code. After July 26, 2006, customers were required to use the new dialing procedure for all calls.

Service area municipalities

Los Angeles County

* Alondra Park *

Athens Athens ( ; el, Αθήνα, Athína ; grc, Ἀθῆναι, Athênai (pl.) ) is both the capital and largest city of Greece. With a population close to four million, it is also the seventh largest city in the European Union. Athens dominates a ...

Avalon Avalon (; la, Insula Avallonis; cy, Ynys Afallon, Ynys Afallach; kw, Enys Avalow; literally meaning "the isle of fruit r appletrees"; also written ''Avallon'' or ''Avilion'' among various other spellings) is a mythical island featured in the ...

Beverly Hills Beverly Hills is a city located in Los Angeles County, California. A notable and historic suburb of Greater Los Angeles, it is in a wealthy area immediately southwest of the Hollywood Hills, approximately northwest of downtown Los Angeles. ...

(small portion in the 323 area code) * Carson * Compton *

Culver City Culver City is a city in Los Angeles County, California, United States. As of the 2020 census, the population was 40,779. Founded in 1917 as a "whites only" sundown town, it is now an ethnically diverse city with what was called the "third-most ...

* Del Aire * East Compton * El Segundo * Gardena * Hawthorne (small portion in the 323 area code) * Hermosa Beach *

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(small portion in the 323 area code) * Lynwood * Ladera Heights (also in the 323 area code) * Lawndale * Lennox *

Lomita Lomita (Spanish for "Little hill") is a city in Los Angeles County, California, United States. The population was 20,921 at the 2020 census, up from 20,256 at the 2010 census. History The Spanish Empire had expanded into this area when the ...

Los Angeles Los Angeles ( ; es, Los Ángeles, link=no , ), often referred to by its initials L.A., is the largest city in the state of California and the second most populous city in the United States after New York City, as well as one of the world ...

** Bel Air ** Brentwood **

Harbor City Harbor City is a highly diverse neighborhood in the Harbor region of Los Angeles, California, with a population upward of 36,000 people. Originally part of the Rancho San Pedro Spanish land grant, the Harbor City was brought into Los Angeles as ...

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(small portion in the 323 area code) ** Pacific Palisades ** Playa del Rey ** Playa Vista ** San Pedro **

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** Westchester ** Westwood ** Wilmington * Lynwood (small portion in the 323 area code) * Malibu * Manhattan Beach *

Marina del Rey Marina del Rey (Spanish for "Marina of the King") is an unincorporated seaside community in Los Angeles County, California, with an eponymous harbor that is a major boating and water recreation destination of the greater Los Angeles area. The ...

Palos Verdes Estates Palos Verdes Estates (''Palos Verdes'', Spanish for "Green Sticks") is a city in Los Angeles County, California, United States, situated on the Palos Verdes Peninsula. The city was master-planned by the noted American landscape architect and p ...

Rancho Palos Verdes Rancho Palos Verdes (Spanish for "Green Sticks Ranch") is a coastal city located in Los Angeles County, California atop the bluffs of the Palos Verdes Peninsula, neighboring other cities in the Palos Verdes Hills, including Palos Verdes Esta ...

* Redondo Beach * Rolling Hills Estates * Rolling Hills *

Santa Monica Santa Monica (; Spanish: ''Santa Mónica'') is a city in Los Angeles County, situated along Santa Monica Bay on California's South Coast. Santa Monica's 2020 U.S. Census population was 93,076. Santa Monica is a popular resort town, owing to i ...

* South Gate (mostly in the 323 area code and small portion in the

562 __NOTOC__ Year 562 ( DLXII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. The denomination 562 for this year has been used since the early medieval period, when the Anno Domini calendar era ...

area code) * Topanga (small portion in the 818 area code) * Torrance * West Athens (mostly in the 323 area code) * West Carson * West Compton *

West Hollywood West Hollywood is a city in Los Angeles County, California, United States. Incorporated in 1984, it is home to the Sunset Strip. As of the 2020 U.S. Census, its population was 35,757. It is considered one of the most prominent gay villages ...

(also in the 323 area code) * Willowbrook (also in the 323 area code)

References

External links

310 Area Code Location, Time Zone, Numbers
araara.co. {{Area code box, State=CA , This=area code 310/424 includes islands offshore , N=

805 __NOTOC__ Year 805 ( DCCCV) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. Events By place Byzantine Empire * Siege of Patras: Local Slavic tribes of the Peloponnese lay siege to ...

, 747/818 , S=

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the conti ...

, E= 323,

, W=Pacific Ocean, 808 , S1=HI

310 __NOTOC__ Year 310 ( CCCX) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Andronicus and Probus (or, less frequently, year 1063 ''A ...

Los Angeles County, California Channel Islands of California Santa Monica Mountains South Bay, Los Angeles Westside (Los Angeles County) Telecommunications-related introductions in 1991 Telecommunications-related introductions in 2006

Splits and overlay controversy

Service area municipalities

Los Angeles County

See also

References

External links