Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: RCMDMAXADS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
413-223 4 Greenfield MA 3849 RINGSQUARED TELECOM LLC 126   2009-04-02   
413-429 8 Great Barrington MA 3849 RINGSQUARED TELECOM LLC 126   2005-10-13   
413-662 8 North Adams MA 3849 RINGSQUARED TELECOM LLC 126   2009-04-02   
413-728 8 Lenox MA 3849 RINGSQUARED TELECOM LLC 126   2004-07-24   
413-884 8 Williamstown MA 3849 RINGSQUARED TELECOM LLC 126   2009-04-02   
413-997 A Pittsfield MA 3849 RINGSQUARED TELECOM LLC 126      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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