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.
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NPA: 401 [Rate centres in NPA 401] [Dial plan for NPA 401]

NXX: 476

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
401-476 A Centredale RI   977E ONVOY, LLC - RI 130   2025-03-02   
401-476 0 Centredale RI   977E ONVOY, LLC - RI 130   2025-03-02   
401-476 1 Centredale RI   977E ONVOY, LLC - RI 130   2025-05-02   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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