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: 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   700J WAVENATION, LLC 130   2026-04-05   
401-571 0 Providence RI   700J WAVENATION, LLC 130   2026-04-05   
401-571 1 Providence RI   6389 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 130   2026-04-25   
401-571 8 Providence RI   6389 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 130   2026-04-25   

Last updated: Sat, 02 May 2026 12:20:53 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.