Area codes 920 and 274 are telephone area codes in the North American Numbering Plan (NANP) for a large area of eastern Wisconsin. Area code 920 was created on July 26, 1997, in a split of area code 414, one of the original North American area codes of 1947. 274 was added to the same numbering plan area (NPA) on May 5, 2023 to create an area code overlay.
When the American Telephone and Telegraph Company (AT&T) divided the North American continent into the original eighty-six numbering plan areas (NPAs) for the first nationwide telephone numbering plan in 1947, Wisconsin received two area codes, 414 for the south and northeast, and 715, for the northern part.
On November 22, 1996, Ameritech notified Bellcore, the North American Numbering Plan Administration (NANPA), that demand for telephone numbers had rapidly increased in the eastern part of the state, so that a jeopardy condition existed in which mitigation could not provided early enough to avoid exhaustion of the numbering pool. [1]
On January 15, 1997, the NANP announce a split of the numbering plan area to create the new area code 920, [2] in which Milwaukee and the surrounding communities south of the city would retain the existing area code, and the northern portion of the numbering plan area would receive 920. The split became effective on July 26, 1997, and a permissive dialing period ended on October 25, 1997. [3]
In 2008, service providers recognized the need for a second area code for northeastern Wisconsin, leading the Public Service Commission of Wisconsin to approve an overlay plan with new area code 274. [4] [5] The effective date for the new area code was announced as March 10, 2012. However, on December 22, 2010, PSC ordered a postponement of the plan due to new exhaustion forecasts for 2014. [6] The Great Recession, number porting, a decline in landlines, and other factors delayed that requirement for fifteen years during which implementation was deferred several times. [7] [8]
Prior to October 2021, area code 920 had telephone numbers assigned for the central office code 988. In 2020, 988 was designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which created a conflict because area code 920 permitted seven-digit dialing. 920 transitioned to ten-digit dialing on October 24, 2021. [9] On December 8, 2008, the Public Service Commission finally approved an all-services distributed overlay as the relief method for NPA 920 and on March 16, 2022, the NANPA established the time line for installation, setting the in-service date of area code 274 to March 22, 2024. Only months later, based on new exhaust studies, [10] this timeline was revised to May 5, 2023. [11]
The area code serves the following counties:
This includes the following towns and cities:
Area code 920 was commonly remembered by using the mnemonic device of the late Green Bay Packer Reggie White's jersey number, 92, adding a zero. [12]
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 805 and 820 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California. The numbering plan area (NPA) includes most or all of the counties of San Luis Obispo, Santa Barbara, Ventura, and the southernmost portions of Monterey County. 805 was split from area code 213 in 1957, and area code 820 was added to the NPA in 2018, creating an area code overlay.
Area codes 561 and 728 are telephone area codes in the North American Numbering Plan (NANP) for Palm Beach County in the U.S. state of Florida. 561 was created on May 13, 1996, in a split of area code 407. The numbering plan area (NPA) comprises nearly every major city in the county, the largest of which being West Palm Beach, Boca Raton, Wellington, Boynton Beach, Jupiter, Delray Beach, and Belle Glade. On March 10, 2023, area code 728 was added to the same numbering plan area to form an all-services distributed 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 codes 516 and 363 are telephone area codes of the North American Numbering Plan (NANP) in the U.S. state of New York. The numbering plan area (NPA) comprises Nassau County on Long Island.
Area code 804 is the telephone area code in the North American Numbering Plan (NANP) for the east-central portion of Virginia. The numbering plan area is anchored by Virginia's capital, Richmond, and includes most of its metropolitan area. Other communities included are Chesterfield, Henrico, Hopewell, Mechanicsville, Powhatan, Midlothian, Petersburg, and Colonial Heights. This also includes the Northern Neck and the Middle Peninsula. The two southernmost counties on the Middle Peninsula, Gloucester and Mathews, are part of the Hampton Roads metropolitan area, but use 804 instead of the area code 757 used by the rest of Hampton Roads.
The 608 area code covers much of southwestern Wisconsin, including the capital city of Madison as well as the cities of Waunakee, Mount Horeb, Verona, Sun Prairie, Monroe, Platteville, Lancaster, Lodi, Portage, Baraboo, Wisconsin Dells, Beloit, Janesville, La Crosse, Prairie du Chien, Prairie du Sac, Sauk City, Viroqua and Sparta. It was created in 1955 as a split from area code 414, and was the third area code created in Wisconsin. Rapid growth of the area has brought the 608 area code close to exhaustion with most recent projections from NANPA projecting the need for an overlay code by late 2023. In September 2022 the Wisconsin Public Service Commission announced the 608 area code will be overlaid with new area code 353.
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 code 780 is a telephone area code in the North American Numbering Plan (NANP) for the Canadian province of Alberta. The numbering plan area comprises the northern two thirds of the province, including the Edmonton area. The area code was established in 1999 in a split of area code 403, which had served the entire province since the establishment of the original North American area codes in 1947. The numbering plan area is also served by area codes 587, 825, and 368, which form a complex overlay for all of Alberta.
Area codes 707 and 369 are telephone area codes in the North American Numbering Plan (NANP) for the northwestern part of the U.S. state of California. The area codes serve part of the northern San Francisco Bay Area, as well as the North Coast. Major cities in the area codes include Napa, Sebastopol, Vallejo, Benicia, Fairfield, Santa Rosa, Windsor, Healdsburg, Rohnert Park, Petaluma, Fort Bragg, Rio Vista, Crescent City, Eureka, Clearlake, Vacaville, Dixon, and Ukiah. 707 was created by a split of area code 415 on March 1, 1959. Area code 369 was added to the numbering plan area (NPA) on February 1, 2023, to form an overlay numbering plan in the service area.
Area codes 845 and 329 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of New York. The numbering plan area comprises the mid- and lower Hudson Valley, specifically Orange, Putnam, Rockland, and Ulster counties, and parts of Columbia, Delaware, Dutchess, Greene, and Sullivan counties.
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 513 is a telephone area code in the North American Numbering Plan (NANP) for the southwest of the U.S. state of Ohio, including Cincinnati and surrounding cities, such as Forest Park, Hamilton, Lebanon, West Chester, Mason, Maineville, Middletown, Milford, Norwood, Oxford, Harrison, Cleves, Miamitown and Trenton.
Area code 970 is a telephone area code in the North American Numbering Plan (NANP) serving most of the western and northern parts of the U.S. state of Colorado. The numbering plan area includes Aspen, Breckenridge, Durango, Estes Park, Fort Collins, Glenwood Springs, Grand Junction, Greeley, Loveland, Silverthorne, Steamboat Springs, and Vail. It was established on April 2, 1995 in an area code split of area code 303, which was retained by the Denver area.
Area code 816 is a telephone area code in the North American Numbering Plan (NANP) for Kansas City, St. Joseph, and all or part of 15 surrounding counties in northwestern Missouri. The numbering plan area originally comprised most of the northern and western two-thirds of the state, bordering with Arkansas, Illinois, Iowa, Kansas, Nebraska, and Oklahoma, but has been reduced to a ribbon bordering Kansas. 816 is one of the original 86 area codes created in 1947.
Area code 618 is a telephone area code in the North American Numbering Plan (NANP) for southern Illinois. The numbering plan area (NPA) comprises one hundred and twenty-six municipalities, such as Carbondale, Cairo, Belleville, East St. Louis, Edwardsville, Marion, O'Fallon, Alton, Mt. Vernon, Centralia, Herrin, Salem, Metropolis, Fairview Heights, Collinsville, and Granite City. Area code 618 was one of the original North American area codes created in 1947.
Area code 440 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Ohio, serving the parts of the Greater Cleveland area, surrounding the city of Cleveland, but not the city and most of its inner suburbs.
Area code 575 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of New Mexico. The numbering plan area (NPA) comprises all of the state outside the Albuquerque, Santa Fe, Farmington, and Gallup metropolitan and micropolitan areas, which use area code 505.
| North: 534/715, 906 | ||
| West: 353/608 | Area Code 920/274 | East: Lake Michigan, 231 |
| South: 262 | ||
| Michigan area codes: 231, 248/947, 269, 313, 517, 586, 616, 734, 810, 906, 989 | ||