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Area codes 314 and 557

May 02, 2023

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.[1]

History

When the American Telephone and Telegraph Company (AT&T) created a universal North American telephone numbering plan for Operator Toll Dialing in 1947, Missouri was divided into two numbering plan areas (NPAs), which received the area codes 314 and 816. Area code 314 identified the eastern part of the state, from the northeast corner of the state at the Illinois border along a southwestern line near Columbia and Jefferson City to the center of the state, and continuing southeast into the east side of the West Plains area to the Arkansas state line. The largest city of the area code was St. Louis on the Mississippi river in the east.

By 1995, the telephone subscriber base experience substantial growth, threatening the exhaustion of the numbering pool.[2] Relief planning entailed the division of the numbering plan area to create a new area code, 573, for most areas outside of the St. Louis metropolitan area, which would retained area code 314. The area code split became effective at day end of January 7, 1996, with a permissive dialing period commencing until July 7, 1996, during which the new numbering plan area could be dialed with both area codes.

Although area code splits were intended as long-term solutions, within only two years, 314 was close to exhaustion once again due to the proliferation of cell phones, fax machines and pagers in St. Louis. As a result, 314 was reduced to include only the exchanges of Chestnut, Jefferson, Prospect, Flanders, Forest, Mission, Melrose, Webster Groves, Parkview, Evergreen, Riverview, Ferguson, Overland, Ladue, Kirkwood, Sappington, Mehlville, Oakville, Creve Coeur, Bridgeton, Hazelwood, Florissant, and Spanish Lake in the core of the St. Louis area.[3] All other exchanges were reassigned to the new area code 636, effective May 22, 1999, with the permissive dialing period ending on February 26, 2000.

On October 24, 2000, the Missouri Public Service Commission announced plans to add a second area code for the 314 numbering plan area, creating an overlay, but postponed the implementation date (May 5, 2002) indefinitely on September 25, 2001, when the commission determined no immediate need for additional central office prefixes.[4] Conservation measures, such as number pooling, mitigated the immediate need for relief.[5] More than twenty years after that announcement, area code 557 was overlaid on August 12, 2022, as the available numbers in 314 neared exhaustion.[6]

Prior to October 2021, area code 314 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.[7][8]

See also

References

  1. ^ "A New 557 Area code is Coming to the 314 Area Code Region". Missouri Public Service Commission. 2022-02-08. Retrieved 2022-07-15.
  2. ^ "NANP-Split of 314 (Missouri) Numbering Plan Area (NPA)" (PDF). Bellcore Letter IL-95708-015. 1995-08-31. Retrieved 2022-12-07.
  3. ^ "Geographic Split of 314 (Missouri) Numbering Plan Area (NPA)" (PDF). Lockheed Martin (NANPA). 1999-02-23. Retrieved 2022-12-07.
  4. ^ "Planning Letter 303: Suspension of the 314 NPA Relief (Missouri)" (PDF). NANPA. 2001-10-05. Retrieved 2022-12-07.
  5. ^ . AT&T. Archived from the original on 2007-10-26. Retrieved December 7, 2022.
  6. ^ "NPA 557 and 314 All-Services Overlay (Missouri)" (PDF). NANPA. 2021-10-28.
  7. ^ "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.
  8. ^ "Many will need to dial all 10 digits before calling soon". FOX 2. 2021-03-05. Retrieved 2021-03-08.

External links

  • NANPA area code map of Missouri
Missouri area codes: 314/557, 417, 573, 636, 660, 816
North: 636
West: 636 area code 314/557 East: 618
South: 573
Illinois area codes: 217, 224/847, 309, 312, 331/630, 618, 708, 773, 779/815, 872

Coordinates: 38°37′N 90°13′W / 38.62°N 90.22°W / 38.62; -90.22

May 02, 2023
area, codes, telephone, area, codes, north, american, numbering, plan, nanp, state, missouri, serving, louis, most, inner, ring, suburbs, neighboring, louis, county, numbering, plan, area, bordered, west, area, code, which, serves, louis, outer, suburbs, west,. 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 1 Contents 1 History 2 See also 3 References 4 External linksHistory EditWhen the American Telephone and Telegraph Company AT amp T created a universal North American telephone numbering plan for Operator Toll Dialing in 1947 Missouri was divided into two numbering plan areas NPAs which received the area codes 314 and 816 Area code 314 identified the eastern part of the state from the northeast corner of the state at the Illinois border along a southwestern line near Columbia and Jefferson City to the center of the state and continuing southeast into the east side of the West Plains area to the Arkansas state line The largest city of the area code was St Louis on the Mississippi river in the east By 1995 the telephone subscriber base experience substantial growth threatening the exhaustion of the numbering pool 2 Relief planning entailed the division of the numbering plan area to create a new area code 573 for most areas outside of the St Louis metropolitan area which would retained area code 314 The area code split became effective at day end of January 7 1996 with a permissive dialing period commencing until July 7 1996 during which the new numbering plan area could be dialed with both area codes Although area code splits were intended as long term solutions within only two years 314 was close to exhaustion once again due to the proliferation of cell phones fax machines and pagers in St Louis As a result 314 was reduced to include only the exchanges of Chestnut Jefferson Prospect Flanders Forest Mission Melrose Webster Groves Parkview Evergreen Riverview Ferguson Overland Ladue Kirkwood Sappington Mehlville Oakville Creve Coeur Bridgeton Hazelwood Florissant and Spanish Lake in the core of the St Louis area 3 All other exchanges were reassigned to the new area code 636 effective May 22 1999 with the permissive dialing period ending on February 26 2000 On October 24 2000 the Missouri Public Service Commission announced plans to add a second area code for the 314 numbering plan area creating an overlay but postponed the implementation date May 5 2002 indefinitely on September 25 2001 when the commission determined no immediate need for additional central office prefixes 4 Conservation measures such as number pooling mitigated the immediate need for relief 5 More than twenty years after that announcement area code 557 was overlaid on August 12 2022 as the available numbers in 314 neared exhaustion 6 Prior to October 2021 area code 314 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 7 8 See also EditList of NANP area codesReferences Edit A New 557 Area code is Coming to the 314 Area Code Region Missouri Public Service Commission 2022 02 08 Retrieved 2022 07 15 NANP Split of 314 Missouri Numbering Plan Area NPA PDF Bellcore Letter IL 95708 015 1995 08 31 Retrieved 2022 12 07 Geographic Split of 314 Missouri Numbering Plan Area NPA PDF Lockheed Martin NANPA 1999 02 23 Retrieved 2022 12 07 Planning Letter 303 Suspension of the 314 NPA Relief Missouri PDF NANPA 2001 10 05 Retrieved 2022 12 07 Area Code Information Missouri AT amp T Archived from the original on 2007 10 26 Retrieved December 7 2022 NPA 557 and 314 All Services Overlay Missouri PDF NANPA 2021 10 28 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 Many will need to dial all 10 digits before calling soon FOX 2 2021 03 05 Retrieved 2021 03 08 External links EditNANPA area code map of Missouri List of exchanges from AreaCodeDownload com 314 Area Code Missouri area codes 314 557 417 573 636 660 816 North 636West 636 area code 314 557 East 618South 573Illinois area codes 217 224 847 309 312 331 630 618 708 773 779 815 872Coordinates 38 37 N 90 13 W 38 62 N 90 22 W 38 62 90 22 Retrieved from https en wikipedia org w index php title Area codes 314 and 557 amp oldid 1126155784, wikipedia, wiki, book, books, library,

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