Area code 513

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.

The regions shown in blue are in Ohio.

History
The four original numbering plan areas of Ohio

The original formulation of a nationwide telephone numbering plan in 1947 divided Ohio into four numbering plan areas (NPA)s, one for each geographic quadrant of the state. AT&T assigned the area code 513 to the southwestern quadrant, which included Cincinnati and Dayton.

Due to the proliferation of cell phones and pagers in the 1990s, the numbering plan area had to be split in 1996 to provide more central office prefixes and telephone numbers. The eastern and northern portions, including Dayton, received area code 937.[1] This made 513 largely coextensive with the Cincinnati metropolitan area, though a few outer eastern suburbs transferred to 937.[2]

In 2000, area code 283 was reserved for numbering plan area 513 to create an overlay plan. Although permissive dialing began on January 15, 2001, the implementation was suspended, because of the economic downturn and the return of telephone numbers as a result of the abandonment of service by competitive local telephone companies.[3] As projected, 283 (or another overlay code) should not need to be implemented until at least 2023.[4] Until 2021, this made Cincinnati one of the largest cities where seven-digit dialing was still possible.

Prior to October 2021, area code 513 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 for exchanges that permit seven-digit dialing. This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021.[5]

Before the public announcement of the original North American area codes in 1947, area code 513 had been considered for assignment in the western third of Iowa, i.e. west of Des Moines, including Sioux City and Council Bluffs. Instead, the area ended up getting 712.[6]

Very similar to how Manhattan is known as "212", Cincinnati is sometimes colloquially referred to as the "513".

References
  1. "Hamilton County | PhoneNumbers.org". ohio.phonenumbers.org. Retrieved 2021-03-31.
  2. "NANPA : Number Resources - NPA (Area) Codes". www.nationalnanpa.com. Retrieved 2021-03-31.
  3. Pending Area Code Exhausts Archived September 29, 2006, at the Wayback Machine. The Public Utilities Commission of Ohio. October 2006.
  4. https://www.nationalnanpa.com/reports/October%202021%20NPA%20Exhaust%20Analysis.pdf
  5. "Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline)" (PDF). North American Numbering Plan Administrator. January 8, 2021. Retrieved March 9, 2021.
  6. The U.S. Government History of Area Codes. November 2007 Archived August 1, 2013, at the Wayback Machine
Ohio area codes: 216, 330/234, 419/567, 440, 513, 614/380, 740/220, 937/326
North: 937/326
West: 812/930, 765 area code 513 East: 937/326
South: 859, 606
Indiana area codes: 219, 260, 317/463, 574, 765, 812/930
Kentucky area codes: 270/364, 502, 606, 859

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