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Area code 413

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This is an old revision of this page, as edited by Kbrose (talk | contribs) at 22:47, 30 August 2023 (→History: Hartwick was tributary to Springfield, so Hartwick was already in 413.). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Geographic region of area code 413 (red)
Massachusetts area codes

Area code 413 is a telephone area code in the North American Numbering Plan (NANP) for the western third of Massachusetts. It is the largest numbering plan area in the Commonwealth, and extends from the New York state line eastward into Worcester County (only the towns of Hardwick and Warren), while excluding the Franklin County towns of Orange, New Salem, Warwick, and Wendell, which use the overlay of area codes 978 and 351. The most-populous city of area code 413 is Springfield. 413 also includes Great Barrington, Greenfield, North Adams, Northampton and Pittsfield. The 413 numbering plan area constitues local access and transport area (LATA) 126.

History

When the American Telephone and Telegraph Company (AT&T) published the first nationwide telephone numbering plan for Operator Toll Dialing in 1947, Massachusetts was divided into two numbering plan areas (NPAs), the only state in New England to be split between multiple NPAs. The western part of the state received area code 413, while the eastern two-thirds (including Boston and Worcester) were assigned 617. The dividing line between the two NPAs ran through far western Worcester County; with everthing west of the tributary exchange areas of Orange, Petersham, Barre, Oakham, North Brookfield, Sturbridge, and Southbridge comprising the 413 NPA.[1] The eastern border of numbering plan area 413 was formed by the exchange areas served by the toll switching points in Northfield, Millers Falls, Montaque, Amherst, Hartwick, Belchertown, Ware, Warren, and Brimfield.

As western Massachusetts is not as densely populated as the eastern portion, 413 remained the region's sole area code even as the eastern portion of the state went from one area code to four from 1988 to 1997. As a result, 413 still maintains its original boundaries. It is also one of the few original area codes, not counting those that cover an entire state, that has not been split or overlaid.

Despite the proliferation of telecommunication services, particularly in and around Springfield, central office codes in 413 are not presently threatened with exhaustion. Under 2021 projections by the North American Numbering Plan Administrator, western Massachusetts is not expected to require exhaustion relief measures until 2041.[2]

In a preliminary version of the new numbering plan of c. 1946, area code 413 had been allotted for use in Pennsylvania.[3]

Service area

Cities and towns

Counties

See also

References

  1. ^ Data from AT&T (1975), Traffice Routing Guide, Section 10.
  2. ^ "2021-2 NRUF and NPA Exhaust Analysis" (PDF). nationalnanpa.com. October 2021. Retrieved April 11, 2023.
  3. ^ "Proposed (but Scrapped) 1946/47 NPA Assignments". April 1, 1996.
Massachusetts area codes: 413, 508/774, 617/857, 781/339, 978/351
North: 603, 802
West: 518/838 413 East: 351/978, 508/774
South: 860/959
Connecticut area codes: 203/475, 860/959
New York area codes: 212/646/332, 315/680, 516/363, 518/838, 585, 607, 631/934, 716/624, 718/347/929, 845/329, 914, 917
New Hampshire area codes: 603
Vermont area codes: 802
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