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: 571 [Rate centres in NPA 571] [Dial plan for NPA 571]

NXX: 406

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-406 A Triangle VA   2593 CORE COMMUNICATIONS, INC.- MD 236      
571-406 0 Triangle VA   5832 CORETEL VIRGINIA, LLC - VA 236      
571-406 1 Triangle VA   275G PEERLESS NETWORK OF VIRGINIA, LLC - VA 236   2015-06-07   
571-406 2 Triangle VA   079F BANDWIDTH.COM CLEC, LLC - VA 236   2010-10-29   
571-406 3 Triangle VA   079F BANDWIDTH.COM CLEC, LLC - VA 236   2010-10-29   
571-406 4 Triangle VA   079F BANDWIDTH.COM CLEC, LLC - VA 236   2010-11-20   
571-406 5 Triangle VA   079F BANDWIDTH.COM CLEC, LLC - VA 236   2011-07-07   
571-406 6 Triangle VA   318J COMCAST IP PHONE LLC 236   2014-01-22   
571-406 7 Triangle VA   079F BANDWIDTH.COM CLEC, LLC - VA 236   2014-03-28   
571-406 8 Triangle VA   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 236   2012-07-01   
571-406 9 Triangle VA   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 236   2013-07-22   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.