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. Everything west of the tributary exchange areas of the control switching points in Orange, Petersham, Barre, Oakham, North Brookfield, Sturbridge, and Southbridge comprised the 413 NPA, so that the border between the two NPAs was formed by the eastern borders of the 413 exchange areas of Northfield, Millers Falls, Montaque, Amherst, Hardwick, 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 threatened with exhaustion until 2041, per 2021 projections by the North American Numbering Plan Administrator,
In a preliminary version of the numbering plan of c. 1946, area code 413 had been allotted for use in Pennsylvania.
Service area
Cities and towns
Adams
Agawam
Alford
Amherst
Ashfield
Becket
Belchertown
Bernardston
Blandford
Brimfield
Buckland
Charlemont
Cheshire
Chester
Chesterfield
Chicopee
Clarksburg
Colrain
Conway
Cummington
Dalton
Deerfield
Easthampton
East Longmeadow
Egremont
Erving
Florida
Gill
Goshen
Granville
Great Barrington
Greenfield
Hadley
Hampden
Hancock
Hardwick
Hatfield
Hawley
Heath
Hinsdale
Holland
Holyoke
Huntington
Lanesborough
Lee
Lenox
Leverett
Leyden
Longmeadow
Ludlow
Middlefield
Monroe
Monson
Montague
Monterey
Montgomery
Mount Washington
New Ashford
New Marlborough
Northampton
Northfield
Otis
Palmer
Pelham
Peru
Pittsfield
Plainfield
Richmond
Rowe
Russell
Sandisfield
Savoy
Sheffield
Shelburne
Shutesbury
South Hadley
Southampton
Southwick
Springfield
Sunderland
Stockbridge
Tyringham
Tolland
Wales
Ware
Warren
Washington
Westfield
Westhampton
West Springfield
West Stockbridge
Whately
Wilbraham
Williamsburg
Williamstown
Windsor
Worthington
Counties
Berkshire County
Hampden County
Hampshire County
Franklin County (except for Orange, New Salem, Warwick, and Wendell) Worcester County (Hardwick and Warren only)