Area codes 310 and 424

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458/541 775 702 928 442/760 916 530 707 209 559 831 805 661 858 909 951 619 213 323 707 916 415 650 510 925 408 209 831 805 661 442/760 310/424 747/818 626 909 951 949 562 657/714
California area codes. The map to the right is clickable; click on an area code to go to the page for that area code. The area code in red is Area Code 310; all others in blue are California area codes.

Area code 310 is a California telephone area code that was split from area code 213 on November 2, 1991. Area code 424 is an overlay of 310 that became effective on July 26, 2006. It is the area code that covers West Los Angeles and South Bay areas of Los Angeles County, including Santa Catalina Island (located 26 miles (42 km) south of the mainland portion of Los Angeles County). It also includes a small portion of Ventura County.[1] Area code 424 is the first non-mobile area code overlay in Southern California. Because of this, dialers in the 310 area code are no longer able to dial a 7-digit number even if they are dialing another phone number in the same area code. Until the overlay of area codes 657 and 714 became active in 2008, the 310-424 complex was the only area code overlay in the entire state of California, despite California having more area codes than any other state.[2]

On January 25, 1997, it was split again, with area code 562 having been created for the southeast portion of Los Angeles County and a portion of Orange County.

List of cities and neighborhoods in the 310 and 424 area codes[edit]

Los Angeles County[edit]

CERRITOS, CA

Splits and overlay controversy[edit]

Area code 562 was originally destined to be an overlay code for cellular telephones and pagers for the existing 310 area, to go into service in late 1995, to be extended to overlay the 213 and 818 areas the following year.[3] However, the plans were changed to a simple split of 310, as the California Public Utilities Commission decided that overlay would have disadvantaged customers of smaller companies in requiring 10 digit dialling.[4]

The south and east portions of 310, roughly the Gateway Cities area of Los Angeles County from Long Beach 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, the 424 overlay for the entire 310 region, was first announced in early 1999. Previously, several proposals had been made to split 310 at Imperial Highway, a major east-west thoroughfare that marks the southern boundary of Los Angeles International Airport. 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 10 digits even when calling local numbers. Championed by Los Angeles Times 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 analog phone-system days, numbers were still being distributed to telephone companies in blocks of 10,000, leading to a huge volume of unused telephone numbers in each area code. Responding to the controversy, the California Assembly 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.

See also[edit]

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External links[edit]

California area codes: 209, 213, 310/424, 323, 408/669, 415, 442/760, 510, 530, 559, 562, 619, 626, 650, 657/714, 661, 707, 747/818, 805, 831, 858, 909, 916, 925, 949, 951
North: 805, 747/818
West: Pacific Ocean, 808 area code 310/424 includes islands offshore East: 323, 562
South: Pacific Ocean
Hawaii area codes: 808