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: 571

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
401-571 A Providence RI EPRVRINBFMD  700J WAVENATION, LLC 130   2026-04-05   
401-571 0 Providence RI EPRVRINBFMD  700J WAVENATION, LLC 130   2026-04-05   
401-571 1 Providence RI PRVDRICEAMD  6389 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 130   2026-04-25   
401-571 2 Providence RI PRVDRIWABMD  321J HD CARRIER LLC 130   2026-07-17   
401-571 3 Providence RI PRVDRIWABMD  321J HD CARRIER LLC 130   2026-07-17   
401-571 4 Providence RI PRVDRIWABMD  321J HD CARRIER LLC 130   2026-07-17   
401-571 8 Providence RI PRVDRICEAMD  6389 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 130   2026-04-25   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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