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: 566

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
401-566 A Jamestown RI PRVDRINW4MD  4016 LEVEL 3 COMMUNICATIONS, LLC - RI 130      
401-566 0 Jamestown RI   4016 LEVEL 3 COMMUNICATIONS, LLC - RI 130   2005-01-07   
401-566 1 Jamestown RI   829J PAETEC ITEL, LLC 130   2004-04-16   
401-566 3 Jamestown RI   4016 LEVEL 3 COMMUNICATIONS, LLC - RI 130   2006-04-27   
401-566 4 Jamestown RI   4016 LEVEL 3 COMMUNICATIONS, LLC - RI 130      
401-566 5 Jamestown RI   829J PAETEC ITEL, LLC 130   2004-11-18   
401-566 6 Jamestown RI   624H ONVOY SPECTRUM, LLC 130   2021-04-16   
401-566 7 Jamestown RI   977E ONVOY, LLC - RI 130   2016-03-24   
401-566 8 Jamestown RI   977E ONVOY, LLC - RI 130   2016-03-24   
401-566 9 Jamestown RI   4016 LEVEL 3 COMMUNICATIONS, LLC - RI 130   2006-08-22   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.