Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
406-945 9 Havre MT   648   2008-11-21   
406-952 0 Great Falls MT   648   2007-02-07   
406-952 1 Great Falls MT   648   2008-06-20   
406-952 4 Great Falls MT   648   2005-07-17   
406-961 9 Hamilton MT   648   2008-11-21   
406-967 1 Worden MT   650   2025-05-06   
406-969 1 Billings MT   650   2011-03-06   
406-969 2 Billings MT   650   2011-07-21   
406-969 3 Billings MT   650   2011-10-13   
406-969 4 Billings MT   650   2012-01-26   
406-969 5 Billings MT   650   2012-01-26   
406-969 6 Billings MT   650   2012-05-03   
406-988 0 Dillon MT   648   2006-03-24   
406-996 A Helena MT HLNAMTHH5MD  648      
406-996 1 Helena MT   648   2011-03-10   
410-623 9 Marion MD   242   2020-09-25   
413-203 1 Easthampton MA   126   2005-11-27   
413-203 2 Easthampton MA   126   2012-07-22   
413-203 5 Easthampton MA   126   2007-12-09   
413-213 0 Belchertown MA   126   2005-11-27   
413-213 1 Belchertown MA   126   2010-01-15   
413-224 0 East Longmeadow MA   126   2019-04-21   
413-224 1 East Longmeadow MA   126   2005-11-27   
413-224 2 East Longmeadow MA   126   2011-06-24   
413-232 5 West Stockbridge MA   126   2016-06-15   
413-245 1 Brimfield MA   126   2005-11-27   
413-271 1 Springfield MA   126   2005-11-27   
413-279 1 Wilbraham MA   126   2005-11-27   
413-279 2 Wilbraham MA   126   2015-11-12   
413-279 3 Wilbraham MA   126   2012-06-21   
413-300 8 Dalton MA   126   2018-11-09   
413-315 8 Holyoke MA   126   2006-12-11   
413-315 9 Holyoke MA   126   2005-11-27   
413-324 1 Palmer MA   126   2005-11-27   
413-331 A Chicopee MA   126   2025-05-06   
413-331 0 Chicopee MA   126   2005-11-27   
413-331 2 Chicopee MA   126   2006-09-03   
413-331 3 Chicopee MA   126   2008-03-26   
413-331 4 Chicopee MA   126   2011-06-24   
413-331 5 Chicopee MA   126   2013-09-20   
413-338 1 Warren MA   126   2006-05-26   
413-353 5 Housatonic MA   126   2016-06-15   
413-387 0 Northampton MA   126   2005-11-27   
413-437 8 Holyoke MA   126   2011-10-21   
413-461 1 Amherst MA   126   2005-11-27   
413-496 3 Pittsfield MA   126   2016-07-03   
413-566 1 Hampden MA   126   2005-11-27   
413-600 2 Stockbridge MA   126   2016-06-15   
413-610 0 Ludlow MA   126   2005-11-27   
413-610 1 Ludlow MA   126   2009-10-17   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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