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.

OCN: 0039 GRANITE STATE TEL., INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
603-478 A Hillsboro Upper Village NH WEARNHXADS1  122      
603-495 A Washington NH WEARNHXADS1  122      
603-529 A Weare NH WEARNHXADS1  122      
603-887 A Chester NH WEARNHXADS1  122      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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