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: 666

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-666 A Washington Zone 17 VA VINNVACBDS0  138E ONVOY, LLC - VA 236      
571-666 0 Washington Zone 17 VA WASKDCFNAMD  6827 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 236   2018-09-26   
571-666 1 Washington Zone 17 VA WASKDCFNAMD  6827 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 236   2018-09-26   
571-666 2 Washington Zone 17 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2018-02-05   
571-666 3 Washington Zone 17 VA WASHDCDP8MD  079F BANDWIDTH.COM CLEC, LLC - VA 236   2018-10-21   
571-666 4 Washington Zone 17 VA WASHDCDP8MD  079F BANDWIDTH.COM CLEC, LLC - VA 236   2019-03-16   
571-666 5 Washington Zone 17 VA WASHDCDP8MD  079F BANDWIDTH.COM CLEC, LLC - VA 236   2019-03-16   
571-666 6 Washington Zone 17 VA VINNVACBDS0  138E ONVOY, LLC - VA 236   2017-11-27   
571-666 7 Washington Zone 17 VA   5832 CORETEL VIRGINIA, LLC - VA 236   2019-07-31   
571-666 8 Washington Zone 17 VA MCLNVA23DS4  8825 LEVEL 3 COMMUNICATIONS, LLC - VA 236   2019-06-10   
571-666 9 Washington Zone 17 VA   138E ONVOY, LLC - VA 236   2024-02-24   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.