Telephone area code for northeastern Iowa, United States
Numbering plan areas of Iowa with the red area indicating area code 563
Area code 563 is a telephonearea code for the east central and northeast corner of the state of Iowa, and includes most of the Iowa side of the Quad Cities. Area code 563 was split from area code 319 in 2001, becoming active on March 25, 2001, and finally becoming mandatory on December 2, 2001.
Prior to the implementation of the code, there was debate over whether the 563 code should have been implemented as a split, or overlaid over the existing 319 code. Mobile phone providers were in favor of the overlay, as a split would have required en masse reprogramming of cell phones. However, at the time, overlays were still a new concept that met with considerable public resistance (due to requirements for 10-digit dialing and mixing of area codes in the same area). It was ultimately decided to use a geographical split instead.
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 code 1. Some North American countries, most notably Mexico, do not participate in the NANP.
Area codes 201 and 551 are telephone area codes in the North American Numbering Plan 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 formulated. After splits in 1958, 1991 and 1997, it covers the northeasternmost portion of the state, including most of Hudson and Bergen counties, bordering the Hudson River and New York City. Major cities in the numbering plan area include Bayonne, Jersey City, Hoboken, Hackensack, Secaucus and Englewood. Area code 551 is an overlay code to the same numbering plan area that was installed in 2001.
Area codes 850 and 448 are telephone area codes in the North American Numbering Plan for the Florida Panhandle, including Pensacola, Tallahassee and Panama City. Area code 850 was created in 1997 in a split from 904, and area code 448 was assigned as a second code to the same area in an overlay plan in 2019, and mandatory ten-digit local calling began in May 2021.
In telecommunications, an overlay plan is a telephone numbering plan that assigns multiple area codes to a geographic numbering plan area (NPA). Overlaying numbering plan area codes is practiced in territories of the North American Numbering Plan (NANP) to prevent exhaustion of telephone numbers and central office codes in growth areas.
Area codes 801 and 385 are area codes in the North American Numbering Plan serving Salt Lake City and the four surrounding counties of the Wasatch Front in north-central Utah. The numbering plan area covers Davis, Morgan, Salt Lake, Utah, and Weber counties. Besides Salt Lake City, major towns and cities within the area are Alta, American Fork, Bountiful, Layton, Lehi, Murray, Ogden, Orem, Provo, Sandy, South Jordan, Spanish Fork, Taylorsville, West Jordan, and West Valley City. This numbering plan area is located in the Mountain Time Zone.
Area codes 615 and 629 are area codes in Tennessee serving Nashville and the 12 surrounding counties. 615 is the main area code, while 629 is an overlay covering the same area that began service in 2014. Murfreesboro, Franklin, Brentwood, Gallatin, Hendersonville, and Lebanon are other major cities in the 615/629 service territory.
Area code 250 is a telephone area code in the North American Numbering Plan (NANP) for the Canadian province of British Columbia outside the Lower Mainland, including Vancouver Island–home to the provincial capital, Victoria–and the province's Interior region. In addition, the numbering plan area extends into the United States community of Hyder, Alaska, located along the Canada–United States border near the town of Stewart. The incumbent local exchange carriers that service the area code are Telus, Northwestel, and CityWest in the city of Prince Rupert.
Area codes 778, 236, and 672 are area codes in the North American Numbering Plan (NANP) for the entire Canadian province of British Columbia. They form an overlay complex with area code 604, which serves only a small southwestern section, the Lower Mainland, of the province, and area code 250, which serves the rest of the province.
Area code 604 is a telephone area code that serves southwestern British Columbia, Canada: the Lower Mainland, Sunshine Coast, Howe Sound / Sea to Sky Corridor, Fraser Valley and the lower Fraser Canyon regions. It primarily serves the city of Vancouver and surrounding regions.
North American area code 602 is a state of Arizona telephone area code that covers most of the city of Phoenix.
Area codes 304 and 681 are telephone area codes in the North American Numbering Plan (NANP) for the entirety of the U.S. state of West Virginia. The numbering plan area was established in October 1947 with area code 304, as one of the eighty-six original North American area codes. Area code 681 was added to the same area in an overlay plan that took effect on March 28, 2009.
Area codes 610, 484, and 835 are telephone area codes in the North American Numbering Plan (NANP) for the eastern and southeastern regions of the U.S. state of Pennsylvania. The numbering plan area (NPA) includes regions to the west of Philadelphia, along with the cities Allentown, Bethlehem, and Reading. It includes much of the Delaware Valley, including almost all of Delaware County, most of the Philadelphia Main Line, and all of the Lehigh Valley.
Area codes 410, 443, and 667 are telephone area codes serving the eastern half of the U.S. state of Maryland, including the Baltimore metropolitan area and the Eastern Shore. The 410 area code is the original area code, while the 443 and 667 codes are overlay codes. 443 and 667 were primarily used with cellular phones and competitive local exchange carriers such as Comcast or Cavalier Telephone when introduced but have since become universal in their carrier availability.
Area code 412 is a telephone area code in the North American Numbering Plan (NANP) for the Commonwealth of Pennsylvania. The numbering plan area (NPA) comprises the city of Pittsburgh, most of surrounding Allegheny County, and small portions of Washington and Westmoreland counties. The area code was one of the original North American area codes created in 1947, when it was assigned to the entire southwestern corner of the state.
Area code 319 is a telephone area code in the North American Numbering Plan (NANP) for the southeastern and east-central parts of the U.S. state of Iowa.
Area code 724 is a Commonwealth of Pennsylvania telephone area code in western and southwestern Pennsylvania, including most of the suburbs of Pittsburgh. It was split from area code 412 on February 1, 1998.
Area codes 860 and 959 are telephone area codes in the North American Numbering Plan in the U.S. state of Connecticut. They are arranged in an overlay plan that covers most of the state, except its southwest, which uses area codes 203 and 475.
Area codes 818 and 747 are area codes that primarily cover the San Fernando Valley region of Los Angeles County in the U.S. state of California.
This page is based on this Wikipedia article Text is available under the CC BY-SA 4.0 license; additional terms may apply. Images, videos and audio are available under their respective licenses.
