519,064 articles
Area codes 213, 323, and 738
Area codes 213, 323, and 738 are three telephone area codes serving central Los Angeles. Created in 1947, 213 gained 323 in 1998 and 738 in 2024.
Area codes 310 and 424
Area codes 310 and 424 are California telephone area codes serving the same western and southern Los Angeles County territory as an overlay complex, created in 1991 and 2006.
Area codes 314 and 557
Area codes 314 and 557 are telephone area codes serving St. Louis, Missouri; 314 dates to 1947, and 557 was activated as its overlay in August 2022.
Area codes 315 and 680
Area codes 315 and 680 are telephone area codes serving the same territory in central and north central New York, including Syracuse, Utica, and Watertown. 315 dates to 1947.
Area codes 408 and 669
Area codes 408 and 669 are telephone area codes serving San Jose, California, and Santa Clara County, with 408 created in 1959 and 669 overlaid in 2012.
Area codes 410, 443, and 667
Area codes 410, 443, and 667 are North American telephone area codes serving eastern Maryland, including Baltimore, as an overlay complex; 410 was split from 301 in 1991, with 443 and 667 overlaid later.
Area codes 415 and 628
Area codes 415 and 628 are North American area codes serving the San Francisco Bay Area of California. 628 was added as an overlay in 2015.
Area codes 416, 647, 437, and 942
Area codes 416, 647, 437, and 942, also called the Toronto area codes, are the four telephone area codes serving the city of Toronto, Ontario, Canada, as stacked overlays.
Area codes 503 and 971
Area codes 503 and 971 are overlapping North American area codes serving northwestern Oregon, including Portland and Salem; 503 dates to 1947 and 971 was added in 1999.
Area codes 519, 226, 548, and 382
Area codes 519, 226, 548, and 382 are telephone area codes serving southwestern Ontario, Canada, including Windsor, London, and Kitchener; 519 dates from 1953, with the others added as overlays.
Area codes 613, 343, and 753
Area codes 613, 343, and 753 are North American telephone area codes serving the same eastern Ontario territory, including Ottawa and Kingston; 613 is an original 1947 code.
Area codes 702 and 725
Area codes 702 and 725 are the telephone area codes serving Las Vegas and Clark County, Nevada. 702 dates to 1947; 725 was added in 2014.
Area codes 705, 249, and 683
Area codes 705, 249, and 683 are telephone area codes serving central and northeastern Ontario, Canada, with 705 created in 1957 and 249 and 683 added as overlays.
Area codes 718, 347, and 929
Area codes 718, 347, and 929 are overlapping telephone area codes in the North American Numbering Plan serving New York City's Bronx, Brooklyn, Queens, and Staten Island.
Area codes 760 and 442
Area codes 760 and 442 are California telephone area codes serving the same southeastern California territory, with 760 created in 1997 and 442 added in 2009 as an overlay.
Area codes 850 and 448
Area codes 850 and 448 serve the Florida Panhandle, covering 18 counties including Pensacola, Panama City, and Tallahassee; 850 was created in 1997 and 448 added in 2021.
Area codes 876 and 658
Area codes 876 and 658, also known as telephone numbers in Jamaica, are the two area codes serving Jamaica, with 876 activated in 1997 and 658 added as an overlay in 2018.
Area codes 905, 289, 365, and 742
Area codes 905, 289, 365, and 742 are telephone area codes serving southern Ontario around Toronto, excluding the city itself, stacked in overlays between 1993 and 2021.
Area codes 919 and 984
Area codes 919 and 984 are North American Numbering Plan codes serving the same north-central North Carolina territory, including Raleigh, Durham, Cary, and Chapel Hill.
Area codes in the Caribbean
Area codes in the Caribbean are the North American Numbering Plan codes for Caribbean and Atlantic islands, which shared code 809 until 1990s splits gave each country its own.
Area control center
An area control center, called an air route traffic control center (ARTCC) in the United States, provides air traffic control to aircraft en route between airports.
Area control error
Area control error (ACE) is the real-time difference between a balancing authority's actual and scheduled net power interchange, adjusted for frequency bias, that automatic generation control drives toward zero.
Area de Conservación Guanacaste
Area de Conservación Guanacaste (ACG) is a protected-area complex in northwest Costa Rica, a UNESCO World Heritage site since 1999 (extended 2004), spanning Pacific marine, dry forest, rain forest, and cloud forest ecosystems with about 235,000 estimated species.
Área de Protección de Flora y Fauna Cuatrociénegas
Área de Protección de Flora y Fauna Cuatrociénegas (APFF Cuatrociénegas): a 84,347-hectare Mexican federal protected area in Coahuila, decreed 7 November 1994, Ramsar site since 2008, a Chihuahuan Desert wetland oasis with over 70 endemic species threatened by aquifer overexploitation.
Área de Protección de Flora y Fauna Laguna de Términos
Área de Protección de Flora y Fauna Laguna de Términos (APFFLT), a 705,016-ha Mexican federal protected area in Campeche decreed 6 June 1994 and a Ramsar site since 2004, protecting Mexico's largest estuarine lagoon and its Mesoamerican mangrove massif.
Área de Protección de Flora y Fauna Yum Balam
APFF Yum Balam, a Mexican flora and fauna protection area decreed 6 June 1994 in Lázaro Cárdenas and Isla Mujeres, Quintana Roo; 154,052.25 ha, Ramsar site 1360, management program published 2018, habitat of jaguar, manatee, and whale shark.
Area di Monte Giulio e Capitaneria
Area di Monte Giulio e Capitaneria: archaeological site at Fiumicino (Portus, Rome) on the quay of Claudius' harbour, with a Trajanic cistern, baths, and 2nd-century harbour offices with a frescoed vault.
Area Licensing Scheme
The Area Licensing Scheme (ALS) was a road pricing system operated in Singapore from 1975 to 1998, the first such system in the world, charging drivers to enter the city center at peak hours.
Area navigation
Area navigation (RNAV) is a method of aircraft navigation permitting flight on any desired path within the coverage of navigation aids, replacing beacon-to-beacon flying with computed point-to-point tracks.
Area of a circle
The area of a circle is the measure of the flat region enclosed by its circumference, given by the formula A = πr², where r is the radius.