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: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
401-257 A Cumberland Hill RI PRVDRIWAX1Y  3460 CTC COMMUNICATIONS CORP. - RI 130      
401-257 0 Cumberland Hill RI PRVDRIWAX1Y  3460 CTC COMMUNICATIONS CORP. - RI 130      
401-257 1 Cumberland Hill RI PRVDRIWAX1Y  3460 CTC COMMUNICATIONS CORP. - RI 130      
401-257 2 Cumberland Hill RI PRVDRIWAX1Y  3460 CTC COMMUNICATIONS CORP. - RI 130      
401-257 3 Cumberland Hill RI PRVDRIWAX1Y  3460 CTC COMMUNICATIONS CORP. - RI 130      
401-257 4 Cumberland Hill RI PRVDRIWAX1Y  4054 CONVERSENT COMMUNICATIONS OF RHODE ISLAND, LLC 130   2004-06-11   
401-257 5 Cumberland Hill RI EPRVRIELCM2  6889 OMNIPOINT MIAMI E LICENSE, LLC 130   2005-06-14   
401-257 6 Cumberland Hill RI PRVDRINW4MD  4016 LEVEL 3 COMMUNICATIONS, LLC - RI 130   2006-01-02   
401-257 7 Cumberland Hill RI PRVDRINW4MD  4016 LEVEL 3 COMMUNICATIONS, LLC - RI 130   2004-09-02   
401-257 8 Cumberland Hill RI EPRVRIELCM2  6889 OMNIPOINT MIAMI E LICENSE, LLC 130   2015-10-24   
401-257 9 Cumberland Hill RI EPRVRIELCM2  6889 OMNIPOINT MIAMI E LICENSE, LLC 130   2007-03-01   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.