Los Angeles County
Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the most populous county in the United States and in the U.S. state of California, with 9,861,224 residents estimated as of 2022. It is th ...
in the U.S. state of
California
California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the ...
.
Area code 818 was created in a split from area code 213 on January 7, 1984. On June 14, 1997, area code 818 was split to form area code 626 for most of the San Gabriel Valley. On May 18, 2009, area code 747 went into service as an overlay.
History
After the standardization of American telephone area codes in 1947, almost all of Los Angeles County used the 213 area code. Because the population and phone usage of the Los Angeles metropolitan area greatly increased during the 1980s and 1990s, the 213 area code was split into several new area codes, including the 818 and 310 area codes. The 818 area code entered service on January 7, 1984, making Los Angeles one of the first major cities to be split between multiple area codes. Area code 626 was carved out of the eastern portion on June 14, 1997.
In November 1999, it was proposed that "at some future date", a new 747 area code would split from 818, the new 747 serving the southern and western portions of the San Fernando Valley. This proposal sat dormant until 2007, when the telephone industry and the California Public Utilities Commission began studying implementing this 818/747 split, or possibly an overlay of all of 818 with 747. Public hearings were held, and the overall public sentiment was for an overlay rather than the split, since they could retain the 818 area code for their existing telephone numbers. The new 747 area code would be used for numbers associated with new service.
On April 24, 2008, the CPUC decided that area code 747 would overlay area code 818 effective May 18, 2009. From that date, new numbers could be assigned to the new area code. Callers within the 818 and 747 area codes would be required to dial the area code (including calls to the same area code; cell phones could dial with or without the "1" prefix) for all calls. There was a grace period starting October 11, 2008 during which callers could still complete calls using the seven-digit number. Since mid-April 2009, calls must be dialed with the area code and number; otherwise, the call will not be completed (cell phone users can omit the "1").
The first telephone number block to be assigned to area code 747 became effective on October 11, 2009.Local calling guide: NPA-747 /ref>
Cities in the 747/818 area code
Neighborhoods/districts in
Los Angeles City
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' ...
Canoga Park
Canoga Park is a neighborhood in the San Fernando Valley region of the City of Los Angeles, California. Before the Mexican–American War, the district was part of a rancho, and after the American victory it was converted into wheat farms and the ...
Studio City
Studio City is a neighborhood in the city of Los Angeles, California, in the southeast San Fernando Valley, just west of the Cahuenga Pass. It is named after the studio lot that was established in the area by film producer Mack Sennett in 1927, ...
Sun Valley Sun Valley may refer to:
Places Australia
* Sun Valley, New South Wales
* Sun Valley, Queensland, a suburb of Gladstone
United States
* Valley of the Sun, a region that covers the Phoenix metropolitan area
*Sun Valley, Arizona
* Sun Valley, Los A ...
Burbank
Burbank may refer to:
Places Australia
* Burbank, Queensland, a suburb in Brisbane
United States
* Burbank, California, a city in Los Angeles County
* Burbank, Santa Clara County, California, a census-designated place
* Burbank, Illinois, ...
*
Calabasas
Calabasas may refer to:
* Calabasas, Arizona, former populated place in what is now Rio Rico, Arizona
* Calabasas, California, city in Los Angeles County, California
See also
* Calabaza
Calabaza is the generic name in the Spanish languag ...
La Crescenta-Montrose
La Crescenta-Montrose () is an unincorporated area in Los Angeles County, California, United States. The community is bordered by Glendale to the south and west, La Cañada Flintridge to the east, and Angeles National Forest to the north. A ...
*
Malibu Lake
Malibou Lake is a small reservoir surrounded by a residential development in the Santa Monica Mountains near Agoura Hills, California. Adjacent to Malibu Creek State Park and within the Santa Monica Mountains National Recreation Area, it is sit ...
Bell Canyon
Bell Canyon is a major drainage of the Santa Ana Mountains in Orange County, California in the United States. Bell Creek (also known as Bell Canyon Creek or Arroyo de las Campanas) flows about in a southerly direction to its confluence with San ...
Session Initiation Protocol
The Session Initiation Protocol (SIP) is a signaling protocol used for initiating, maintaining, and terminating communication sessions that include voice, video and messaging applications. SIP is used in Internet telephony, in private IP telep ...
addresses on some VoIP networks such as Gizmo5 (in the format 747NXXXXXX). Because of this conflict, some outgoing calls from VoIP networks using a 10-digit SIP address could have been mistaken for calls originating from the actual 747 area code.
These addresses are no longer in use as Gizmo5 service was discontinued as of April 3, 2011.
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 ...