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.


NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
603-269 A Center Barnstead NH CNBNNHXADS0  122      
603-364 A Gilmanton Iron Works NH GLTNNHXADS0  122      
603-776 A Barnstead NH BRNSNHXADS0  122      
603-859 A New Durham NH NWDRNHXADS0  122      
603-875 A Alton NH ALTNNHXADS0  122      

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

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