Area codes 937 and 326 are telephone area codes in the North American Numbering Plan (NANP) assigned to a numbering plan area (NPA) that encompasses much of the southwestern part of the U.S. state of Ohio, including Dayton and Springfield. Area code 937 was established in September 1996, after a split of area code 513. Area code 326 was added to area code 937 in an overlay plan in March 2020.
Area code 937 was created in a split of Ohio's original NPA for the southwestern part of the state (area code 513) on September 28, 1996. At the time, literature promoting the new area code took advantage of the fact that the digits of 937 spell out "YES" on a standard telephone keypad. [1] [2]
As of April 2018, projections by the North American Numbering Plan Administrator expected that telephone exchanges ("central office codes") would be exhausted for area code 937 by the third quarter of 2020, [3] so on July 3, 2018, area code 326 (which spells out "DAO" as in "DAyton, Ohio") was planned to overlay the 937 area. [4] [5] Beginning August 10, 2019, subscribers were encouraged to dial ten digits for local calls within the area code. On February 8, 2020, traditional seven-digit dialing ended, and on March 8, 2020, area code 326 was activated. [6] [7] [8] [9]
Area codes 937 and 326 serve Dayton, its metropolitan area, Springfield, public (non-Defense Switched Network) communications at Wright-Patterson Air Force Base, a few outer eastern suburbs of Cincinnati, and most of southwest Ohio north and east of the Cincinnati metropolitan area.
Communities served with a 2019 population greater than 10,000, and those that are county seats, include Beavercreek, Bellefontaine, Centerville, Clayton, Dayton, Eaton, Englewood, Fairborn, Franklin, Georgetown, Greenville, Hillsboro, Huber Heights, Kettering, Marysville, Miamisburg, Piqua, Riverside, Sidney, Springboro, Springfield, Tipp City, Trotwood, Troy, Urbana, Vandalia, West Carrollton, West Union, Wilmington and Xenia. [4]
Counties comprising the numbering plan area include all or parts of Adams, Brown, Champaign, Clark, Clermont, Clinton, Darke, Greene, Hardin, Highland, Logan, Madison, Miami, Montgomery, Preble, Ross, Scioto, Shelby, Union and Warren.
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 telephone country code 1. Some North American countries, most notably Mexico, do not participate in the NANP.
Area codes 954 and 754 are the telephone area codes in the North American Numbering Plan (NANP) for Broward County, Florida. Notable cities in the numbering plan area are Fort Lauderdale, Plantation, Hollywood, Parkland, Sunrise, Pompano Beach, Coral Springs, Deerfield Beach, Davie, Weston, Dania Beach, Oakland Park and Pembroke Pines.
Ten-digit dialing is a telephone dialing procedure in the countries and territories that are members of the North American Numbering Plan (NANP). It is the practice of including the area code of a telephone number when dialing to initiate a telephone call. When necessary, the ten-digit number may be prefixed with the trunk code 1, which is referred to as 1+10-digit dialing or national format.
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 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.
Number pooling is a method of reallocating telephony numbering space in the North American Numbering Plan, primarily in growth areas in the United States.
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 202 and 771 are telephone area codes in the North American Numbering Plan (NANP) for Washington, D.C.
Area codes 876 and 658 are telephone area codes in the North American Numbering Plan (NANP) for Jamaica.
Area codes 812 and 930 are telephone area codes in the North American Numbering Plan (NANP) for the southern third of the state of Indiana.
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 codes 301, 240, and 227 are telephone area codes in the North American Numbering Plan (NANP) for the western part of the U.S. state of Maryland. The numbering plan area (NPA) comprises Maryland's portion of the Greater Washington, D.C. metro area, portions of southern Maryland, along with rural western Maryland. This includes the communities of Cumberland, Frederick, Hagerstown, Gaithersburg, Potomac, Germantown, Bethesda, Rockville, Landover, Silver Spring, and Waldorf.
Area codes 217 and 447 are telephone area codes in the North American Numbering Plan (NANP) for much of the central part of the U.S. state of Illinois. The numbering plan area (NPA) includes the state capital, Springfield, and Champaign, Urbana, Decatur, Taylorville, Danville, Effingham, Quincy, Rantoul, and Jacksonville. 217 was one of the original North American area codes created in 1947 and 447 was added to the same area in 2021 to form an all-services overlay.
Area codes 513 and 283 are telephone area codes 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 codes 303, 720 and 983 are telephone area codes in the North American Numbering Plan for the north-central portion of the U.S. state of Colorado. The numbering plan area comprises Denver and Boulder, as well as their surrounding suburbs, including Lakewood, Littleton, Longmont, Broomfield, Aurora, and Castle Rock. Area code 303 is the original area code, while area codes 720 and 983 were added to form an overlay plan for the area, meaning that the same geographic service area is served by all area codes and that ten-digit dialing is required for all calls made within the service 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 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.
The expansion of the North American Numbering Plan (NANP) is the anticipated requirement for providing more telephone numbers to accommodate future needs beyond the pool of ten-digit telephone numbers. Ten-digit telephone numbers have been in use in the United States and Canada in long-distance telephone service since 1947. An October 2020 analysis estimated that the numbering plan would not be exhausted until after the year 2050.
| North: 419/567 | ||
| West: 260, 513/283, 765 | Area codes 937 and 326 | East: 614/380, 740/220 |
| South: 513/283, 606 | ||
| Indiana area codes: 219, 260, 317/463, 574, 765, 812/930 | ||
| Kentucky area codes: 270/364, 502, 606, 859 | ||