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Area codes 610, 484, and 835

October 24, 2023

Area codes 610, 484, and 835 are telephone area codes in the North American Numbering Plan (NANP) for the eastern and southeastern regions of Pennsylvania. The numbering plan area (NPA) includes regions to the west of Philadelphia and 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 code 716Area code 585Area code 607Area code 845Area codes 973 and 862Area code 908Area codes 410 and 443Area code 302Area codes 240 and 301Area codes 304 and 681Area codes 330 and 234Area code 440Area code 724Area code 878Area code 724Area code 814Area codes 272 and 570Area codes 610, 484, and 835Area code 856Area codes 215, 267, and 445Area codes 609 and 640Area codes 223 and 717Area code 412
Pennsylvania (blue) with numbering plan area 484 shown in red.

History Edit

Area code 610 was assigned on January 8, 1994, in an area code split from numbering plan area 215, which had been the entire southeast quadrant of Pennsylvania since 1947. Permissive dialing of both 215 and 610 continued until the morning of January 7, 1995.[1] It was Pennsylvania's first new area code since the definition of the area code system in 1947.

Three exchanges which would have switched to 610 were instead switched to 717, the area code for most of the eastern half of the state outside of the lower Delaware and Lehigh Valleys. The central office prefixes were 267 at Denver, 445 at Terre Hill, and 484 at Adamstown with 267 being renumbered as 717-336 because 717-267 was already in use at Chambersburg. These exchanges were all served by independent, non-Bell telephone companies, which sought to consolidate their eastern Pennsylvania customers into one area code and would have had to change area codes regardless.

This was intended as a long-term solution, but further growth in the region over the subsequent five years, and the proliferation of cell phones and pagers, spurred the introduction of area code 484 as an overlay for the 610 region on June 5, 1999, along with the introduction of mandatory ten-digit dialing.[2]

Area code 835 was intended as an additional code for the 610/484 overlay, as announced by the Pennsylvania Public Utility Commission in May 2000, and to be implemented in 2001. However, newly developed, more efficient number pooling measures were introduced instead, eliminating the immediate need for the new area code. The Commission formally withdrew plans for the new code on June 23, 2005, although the code remained reserved for later use within Pennsylvania if necessary.[3] Area code 835 was eventually approved by the Public Utility Commission on December 2, 2021. Assignment of central office codes in the new area code began on September 2, 2022.[4]

When area codes were introduced in 1947, their middle digit was either 0 or 1. In 1994, area code 610 was the last area code assigned with digit 1 in that position. The next new area codes assigned in 1995 (334 in Alabama, and 360 in Washington state) were the first interchangeable area codes.

Prior usage of 610 for TWX Edit

In 1962, AT&T assigned NPA 610 for conversion to dial service of the Teletypewriter Exchange Service (TWX) in Canada.[5][6] While Telex II use of area codes was terminated in 1981 in the US by Western Union, Canadian use of 610 continued until October 31, 1993, when it was exchanged in a flash cut for area code 600 for non-geographic applications.[7]

Service area Edit

The following counties and municipalities are in the numbering plan area:

Counties Edit

Towns and cities Edit

See also Edit

References Edit

  1. ^ "Bellcore Letter Number IL-93/01-001: NANP-Split of 215 (Pennsylvania) Numbering Plan Area (NPA)" (PDF). NANPA. 1993-01-05. Retrieved 2023-08-15.
  2. ^ "Area Codes in Southeast Pennsylvania", Pennsylvania Public Utility Commission
  3. ^ "PUC withdraws 835 overlay in 610/484 area codes", Pennsylvania Public Utility Commission, June 23, 2005
  4. ^ "Planning Letter 578: NPA 835 and 484/610 All-Services Overlay (Pennsylvania)" (PDF). NANPA. 2022-01-13. Retrieved 2023-07-20.
  5. ^ Tyberghein, E.J. (July 1962). "TWX Goes Dial". Bell Laboratories Record: 232.
  6. ^ Traffic Routing Guide, sec. 15-16, AT&T, 1975
  7. ^ "Introduction of Service Access Code (SAC) 600 to Canada" (PDF). Bellcore (NANPA). 1993-04-15. Retrieved 2023-08-14.

External links Edit

  • North American Numbering Plan Administration
  • NANPA area code map of Pennsylvania
Pennsylvania area codes: 215/267/445, 223/717, 272/570, 412, 484/610, 724, 814/582, 878
North: 570/272
West: 717/223 484/610/835 East: 215/267/445, 856, 609/640, 908
South: 302, 410/443/667, 856
Delaware area codes: 302
Maryland area codes: 227/240/301, 410/443/667
New Jersey area codes: 201/551, 609/640, 732/848, 856, 862/973, 908

40°05′10″N 75°21′25″W / 40.086°N 75.357°W / 40.086; -75.357

October 24, 2023
area, codes, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, june, 2021, le. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Area codes 610 484 and 835 news newspapers books scholar JSTOR June 2021 Learn how and when to remove this template message Area codes 610 484 and 835 are telephone area codes in the North American Numbering Plan NANP for the eastern and southeastern regions of Pennsylvania The numbering plan area NPA includes regions to the west of Philadelphia and 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 Pennsylvania blue with numbering plan area 484 shown in red Contents 1 History 2 Prior usage of 610 for TWX 3 Service area 3 1 Counties 3 2 Towns and cities 4 See also 5 References 6 External linksHistory EditArea code 610 was assigned on January 8 1994 in an area code split from numbering plan area 215 which had been the entire southeast quadrant of Pennsylvania since 1947 Permissive dialing of both 215 and 610 continued until the morning of January 7 1995 1 It was Pennsylvania s first new area code since the definition of the area code system in 1947 Three exchanges which would have switched to 610 were instead switched to 717 the area code for most of the eastern half of the state outside of the lower Delaware and Lehigh Valleys The central office prefixes were 267 at Denver 445 at Terre Hill and 484 at Adamstown with 267 being renumbered as 717 336 because 717 267 was already in use at Chambersburg These exchanges were all served by independent non Bell telephone companies which sought to consolidate their eastern Pennsylvania customers into one area code and would have had to change area codes regardless This was intended as a long term solution but further growth in the region over the subsequent five years and the proliferation of cell phones and pagers spurred the introduction of area code 484 as an overlay for the 610 region on June 5 1999 along with the introduction of mandatory ten digit dialing 2 Area code 835 was intended as an additional code for the 610 484 overlay as announced by the Pennsylvania Public Utility Commission in May 2000 and to be implemented in 2001 However newly developed more efficient number pooling measures were introduced instead eliminating the immediate need for the new area code The Commission formally withdrew plans for the new code on June 23 2005 although the code remained reserved for later use within Pennsylvania if necessary 3 Area code 835 was eventually approved by the Public Utility Commission on December 2 2021 Assignment of central office codes in the new area code began on September 2 2022 4 When area codes were introduced in 1947 their middle digit was either 0 or 1 In 1994 area code 610 was the last area code assigned with digit 1 in that position The next new area codes assigned in 1995 334 in Alabama and 360 in Washington state were the first interchangeable area codes Prior usage of 610 for TWX EditIn 1962 AT amp T assigned NPA 610 for conversion to dial service of the Teletypewriter Exchange Service TWX in Canada 5 6 While Telex II use of area codes was terminated in 1981 in the US by Western Union Canadian use of 610 continued until October 31 1993 when it was exchanged in a flash cut for area code 600 for non geographic applications 7 Service area EditThe following counties and municipalities are in the numbering plan area Counties Edit Berks County The entire county except the extreme western portions in 717 extreme northern portions in 570 and the Hereford area which is served by the Pennsburg exchange in the 215 267 area code Bucks County The northeastern portion of the county is served by the Coopersburg Springtown Riegelsville and Ferndale exchanges Carbon County The southern portion of the county is served by 377 Lehighton and 824 and 826 Palmerton exchanges The western end of the county including Lansford and Summit Hill use 610 and 484 for mobile and digital numbers while retaining 570 and 645 for conventional phone numbers Chester County The entire county except the extreme western portion which is served by the 717 and 442 Gap exchange Delaware County The entire county Lancaster County Only the far southeastern portion of the county centered on Christiana The rest of county uses the 717 area code Lebanon County Newmanstown is the only Lebanon County municipality to use 610 as its area code specifically 610 589 XXXX which is also used by Womelsdorf Lehigh County The entire county except the southwestern portion which is served by the Pennsburg exchange in the 215 and 267 overlay Monroe County The far southwestern portion of the county Montgomery County The southern and western portions of the county Other areas of the county are served by the 215 and 267 area codes New Castle County Delaware A few residences along West Ridge Road and Sterling Avenue in Claymont Delaware use the 610 484 and 835 exchange Northampton County The entire county except the northeastern portions including Portland and Upper Bethel Township which are in the 570 area code Schuylkill County The southern and eastern fringes of the county including portions of East Brunswick West Brunswick and West Penn Township which are served by the Lehighton Germansville and Kempton exchanges Port Clinton is assigned to 610 and 484 however the majority of it is in 570 and 272 and even smaller portions including Tower City is in 717 Towns and cities Edit Allentown Bethlehem Catasauqua Chadds Ford Chester Christiana Downingtown Easton Emmaus Exton Folsom Gap Hamburg Havertown Kutztown Lehighton Macungie Malvern Media Newtown Square North Catasauqua Northampton Oxford Palmerton Paoli Pottstown Reading Shillington Sinking Spring Tamaqua Upper Darby West Chester Whitehall Township Willistown Wind Gap WyomissingSee also EditList of North American Numbering Plan area codes List of Pennsylvania area codesReferences Edit Bellcore Letter Number IL 93 01 001 NANP Split of 215 Pennsylvania Numbering Plan Area NPA PDF NANPA 1993 01 05 Retrieved 2023 08 15 Area Codes in Southeast Pennsylvania Pennsylvania Public Utility Commission PUC withdraws 835 overlay in 610 484 area codes Pennsylvania Public Utility Commission June 23 2005 Planning Letter 578 NPA 835 and 484 610 All Services Overlay Pennsylvania PDF NANPA 2022 01 13 Retrieved 2023 07 20 Tyberghein E J July 1962 TWX Goes Dial Bell Laboratories Record 232 Traffic Routing Guide sec 15 16 AT amp T 1975 Introduction of Service Access Code SAC 600 to Canada PDF Bellcore NANPA 1993 04 15 Retrieved 2023 08 14 External links EditNorth American Numbering Plan Administration NANPA area code map of PennsylvaniaPennsylvania area codes 215 267 445 223 717 272 570 412 484 610 724 814 582 878 North 570 272West 717 223 484 610 835 East 215 267 445 856 609 640 908South 302 410 443 667 856Delaware area codes 302Maryland area codes 227 240 301 410 443 667New Jersey area codes 201 551 609 640 732 848 856 862 973 90840 05 10 N 75 21 25 W 40 086 N 75 357 W 40 086 75 357 Retrieved from https en wikipedia org w index php title Area codes 610 484 and 835 amp oldid 1176485975, wikipedia, wiki, book, books, library,

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