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: NPRVRIMSDS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
401-231 A Centredale RI 9102 VERIZON NEW ENGLAND INC. 130      
401-232 A Centredale RI 9102 VERIZON NEW ENGLAND INC. 130      
401-233 A Centredale RI 9102 VERIZON NEW ENGLAND INC. 130      
401-353 A Providence RI 9102 VERIZON NEW ENGLAND INC. 130      
401-354 A Providence RI 9102 VERIZON NEW ENGLAND INC. 130      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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