Area codes 314 and 557 are telephone area codes in the North American Numbering Plan (NANP) in the U.S. state of Missouri, serving St. Louis and most of its inner-ring suburbs in neighboring St. Louis County. The numbering plan area is bordered to the west by area code 636, which serves St. Louis' outer suburbs to the west, south, and north. Across the Mississippi River to the east, 314 is adjacent to area code 618, which serves southern Illinois and most of Metro East. Area code 557 was added to the 314 numbering plan area on August 12, 2022, to form an overlay numbering plan.
Area codes 201 and 551 are telephone area codes in the North American Numbering Plan (NANP) in the U.S. State of New Jersey. Area code 201 was the area code assigned to the entire state of New Jersey in 1947, when the North American area code system was formed. After splits in 1956, 1991, and 1997, it is assigned to the northeastern portion of the state, including most of Hudson and Bergen counties, bordering New York City. Major cities in the numbering plan area include Bayonne, Jersey City, Hoboken, Hackensack, Secaucus and Englewood. Area code 551 was added to this numbering plan area in 2001 in formation of an overlay. Area code 201 is also assigned for wireless services in some rate centers in the 973 and 908 numbering plan areas, such as Newark, Morristown, and New Brunswick.
Area code 612 is a telephone area code in the North American Numbering Plan (NANP) in the U.S. state of Minnesota. The numbering plan area comprises the city of Minneapolis and a few surrounding municipalities such as Fort Snelling, St. Anthony, and Richfield. Geographically, it is the smallest area code in the state of Minnesota. The area code is one of the two original area codes in the 1947 nationwide numbering plan for the state, when it was assigned to a much larger area, including the entire Twin Cities region and a wide area surrounding it.
Area codes 541 and 458 are telephone area codes in the North American Numbering Plan (NANP) for most of the U.S. state of Oregon, excluding only the northwestern corner of the state. The service area includes the cities of Eugene, Springfield, Corvallis, Albany, Medford, Bend, Ashland, Klamath Falls, The Dalles, Burns, Lakeview, and Pendleton, as well as the coastal region from Lincoln County to the California border. Area code 541 was created in an area code split from area code 503 on November 5, 1995. Area code 458 was added to the same service area on February 10, 2010 to form an overlay.
Area code 414 is a telephone area code of the North American Numbering Plan for the area around and including the city of Milwaukee in the state of Wisconsin.
Area code 262 is a telephone area code in the North American Numbering Plan (NANP) for southeastern Wisconsin, and was created on September 25, 1999, in an area code split of area code 414. The numbering plan area comprises most suburbs of Milwaukee, but not Milwaukee County.
Area code 813 is an area code in the North American Numbering Plan (NANP) for the city of Tampa, Florida, and surrounding areas such as Zephyrhills and Oldsmar.
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 codes 704 and 980 are telephone area codes in the North American Numbering Plan (NANP) for Charlotte and all or part of 12 surrounding counties in south-central North Carolina. Other major cities in the service area are Gastonia, Kannapolis, Concord, Mooresville, Salisbury, Statesville, and Shelby. The South Carolina side of the Charlotte metropolitan area is part of area codes 803 and 839. Area code 704 is one of the original area codes assigned to numbering plan areas (NPAs) by AT&T in October 1947. Area code 980 was added in an overlay numbering plan in 2000.
Area code 616 is the telephone area code in the North American Numbering Plan (NANP) for Greater Grand Rapids, Michigan. The numbering plan area also includes the towns of Holland, Greenville, and Grand Haven. This comprises all of Kent and Ottawa counties, and parts of neighboring counties, including the western and central parts of Ionia County. It was one of the original North American area codes created in 1947.
Area codes 410, 443, and 667 are telephone area codes in the North American Numbering Plan (NANP) for the eastern half of the U.S. state of Maryland. The numbering plan area (NPA) includes the Baltimore metropolitan area and the Eastern Shore. The three area codes are overlay codes for one numbering plan area, among which 410 was the initial area code for the NPA, when it was split from area code 301 in 1991. 443 and 667 found assignment primarily in cellular service and for competitive local exchange carriers, such as Comcast and Cavalier Telephone, when introduced, but have since become universal in carrier availability.
Area code 206 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Washington. The numbering plan area (NPA) includes Seattle and most of its innermost suburbs. This includes such suburbs as Shoreline and Lake Forest Park; Mercer, Bainbridge, and Vashon Islands; and portions of metropolitan Seattle from Des Moines to Woodway.
Area code 509 is the telephone area code in the North American Numbering Plan (NANP) for the eastern part of the U.S. state of Washington. The numbering plan area (NPA) roughly comprises the state east of the Cascade Mountains, and includes Spokane, the Tri-Cities, Ellensburg, Yakima, Walla Walla, and Wenatchee. It was created in a split of area code 206 in 1957. Area code 206 was the original area code for all of Washington, when the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan for Operator Toll Dialing in 1947.
Area codes 609 and 640 are telephone area codes in the North American Numbering Plan (NANP) for the central and southern parts of the U.S. state of New Jersey. The numbering plan area includes the cities of Trenton, Princeton, Ewing, Hamilton, and southeastern parts of the state and the Jersey Shore, including Atlantic City and Long Beach Island. In terms of geographic coverage, it is the largest numbering plan area in New Jersey. Area code 609 was created in a split of area code 201 in c. 1956. Area code 640 is an additional area code for the modern configuration of 609, creating an overlay numbering plan.
Area code 228 is the telephone area code in the North American Numbering Plan (NANP) for the Gulf Coast in the U.S. state of Mississippi, serving the three counties in the state's southeastern tip: Hancock, Harrison, and Jackson. It was the second area code created in the state, when in 1997, the numbering plan area was split from the original, state-wide area code 601. Area code 601 was further reduced in size when area code 662 was created in 1999 for the northern half of Mississippi.
Area code 785 is a telephone area code in the North American Numbering Plan for most of the northern part of the U.S. state Kansas. It was created in a split of the numbering plan area 913 on July 20, 1997. The numbering plan area stretches from the Colorado state line on the west to the Missouri state line on the east, while excluding the Kansas side of the Kansas City metropolitan area, which retained 913. The largest city by population isTopeka, the state capital city.
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.
Area code 636 is a telephone area code in North American Numbering Plan (NANP) for the east-central part of the U.S. state of Missouri, comprising mainly the western suburbs of St. Louis. It includes parts of Chesterfield and Fenton in St. Louis County, and all of Troy, St. Charles, Jefferson, and Warren counties, as well as the towns of High Hill and Jonesburg in Montgomery County. It was created in 1999 in an area code split from area code 314, which was one of the original North American area codes of 1947.
Area code 423 is a telephone area code in the North American Numbering Plan for the U.S. state of Tennessee. It comprises two disconnected areas of East Tennessee that are separated by area code 865.
