The first nationwide telephone numbering plan of 1947 divided telecommunications services in Ohio into four numbering plan areas (NPAs), one for each quadrant of the state. AT&T assigned 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 as an overlay code for numbering plan area 513. 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] Projections showed no need for an overlay code in Cincinnati until at least 2023.[4]
As of 2022[update], 195 (32.4%) of the 602 forecasted number blocks (of 1,000 each) for area code 513 had been assigned.[7] NANP projections indicated exhaustion of central office prefixes in 513 by the fourth quarter of 2023.[8] For relief, on December 15, 2021, the Public Utilities Commission of Ohio approved an all-service overlay complex for the numbering plan area with the new area code 283. Area code 283 became available to carriers on April 28, 2023, after they exhausted any remaining blocks in the 513 area code.[9][10]
As of April 2023[update], the two area codes combined are projected to avoid exhaustion for the foreseeable future.[11]
^Pending Area Code Exhausts September 29, 2006, at the Wayback Machine. The Public Utilities Commission of Ohio. October 2006.
^2021-2 NRUF and NPA Exhaust Analysis nationalnanpa.com
^"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.
^DeLetter, Emily (October 18, 2021). "Cincinnati, NKY will have to dial an area code starting Sunday". The Cincinnati Enquirer. Retrieved December 16, 2021.
^2022 NANPA Annual Report (PDF) (Report). East Brunswick, New Jersey: NANPA. 2022. p. 53.
^DeLetter, Emily (December 16, 2021). "Southwest Ohio's 513 area code is almost out of numbers, adding 283". The Cincinnati Enquirer. Retrieved December 16, 2021.
^"Area Code Changes". from the original on January 2, 2023.
^Kreemer, Avery (April 3, 2023). "Area code 283 to officially debut in region later this month". Journal-News. Liberty Township, Butler County, Ohio. Retrieved June 18, 2023.
area, codes, telephone, area, codes, north, american, numbering, plan, nanp, southwest, state, ohio, including, cincinnati, surrounding, cities, such, forest, park, hamilton, lebanon, west, chester, mason, maineville, middletown, milford, norwood, oxford, harr. 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 The regions shown in blue are in Ohio Contents 1 History 2 See also 3 References 4 External linksHistory edit nbsp The four original numbering plan areas of OhioThe first nationwide telephone numbering plan of 1947 divided telecommunications services in Ohio into four numbering plan areas NPAs one for each quadrant of the state AT amp T assigned 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 as an overlay code for numbering plan area 513 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 Projections showed no need for an overlay code in Cincinnati until at least 2023 4 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 along with the neighboring area code 859 therefore transitioned to ten digit dialing on October 24 2021 5 6 As of 2022 update 195 32 4 of the 602 forecasted number blocks of 1 000 each for area code 513 had been assigned 7 NANP projections indicated exhaustion of central office prefixes in 513 by the fourth quarter of 2023 8 For relief on December 15 2021 the Public Utilities Commission of Ohio approved an all service overlay complex for the numbering plan area with the new area code 283 Area code 283 became available to carriers on April 28 2023 after they exhausted any remaining blocks in the 513 area code 9 10 As of April 2023 update the two area codes combined are projected to avoid exhaustion for the foreseeable future 11 See also editList of Ohio area codes List of North American Numbering Plan area codesReferences edit Hamilton County PhoneNumbers org ohio phonenumbers org Retrieved 2021 03 31 NANPA Number Resources NPA Area Codes www nationalnanpa com Retrieved 2021 03 31 Pending Area Code Exhausts Archived September 29 2006 at the Wayback Machine The Public Utilities Commission of Ohio October 2006 2021 2 NRUF and NPA Exhaust Analysis nationalnanpa com 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 DeLetter Emily October 18 2021 Cincinnati NKY will have to dial an area code starting Sunday The Cincinnati Enquirer Retrieved December 16 2021 2022 NANPA Annual Report PDF Report East Brunswick New Jersey NANPA 2022 p 53 DeLetter Emily December 16 2021 Southwest Ohio s 513 area code is almost out of numbers adding 283 The Cincinnati Enquirer Retrieved December 16 2021 Area Code Changes Archived from the original on January 2 2023 Kreemer Avery April 3 2023 Area code 283 to officially debut in region later this month Journal News Liberty Township Butler County Ohio Retrieved June 18 2023 2023 1 NRUF and NPA Exhaust Analysis PDF Report East Brunswick New Jersey North American Numbering Plan Administrator April 2023 p 2 Retrieved June 18 2023 External links editNANPA area code map of OhioOhio area codes 216 330 234 419 567 440 513 614 380 740 220 937 326 North 937 326West 812 930 765 513 283 East 937 326South 859 606Indiana area codes 219 260 317 463 574 765 812 930Kentucky area codes 270 364 502 606 85939 15 N 84 30 W 39 250 N 84 500 W 39 250 84 500 Retrieved from https en wikipedia org w index php title Area codes 513 and 283 amp oldid 1177277880, wikipedia, wiki, book, books, library,
