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: 252

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
401-252 A Warren RI EPRVRIELCM2  6664 SPRINT SPECTRUM, L.P. 130      
401-252 0 Warren RI   631G PEERLESS NETWORK OF RHODE ISLAND, LLC - RI 130   2018-12-17   
401-252 1 Warren RI   6664 SPRINT SPECTRUM, L.P. 130      
401-252 2 Warren RI   977E ONVOY, LLC - RI 130   2020-07-11   
401-252 4 Warren RI   318J COMCAST IP PHONE LLC 130   2018-03-10   
401-252 5 Warren RI   977E ONVOY, LLC - RI 130   2020-07-11   
401-252 6 Warren RI   6664 SPRINT SPECTRUM, L.P. 130      
401-252 7 Warren RI   508J CENTURYLINK COMMUNICATIONS LLC 130   2015-12-12   
401-252 8 Warren RI   073H TELNYX LLC 130   2021-05-29   
401-252 9 Warren RI   6664 SPRINT SPECTRUM, L.P. 130      

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.