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: 544

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-544 A Washington Zone 19 VA ARTNVAARXBY  965H FRACTEL, LLC 236      
571-544 0 Washington Zone 19 VA WASKDCFNAMD  6827 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 236   2020-12-24   
571-544 1 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-09-07   
571-544 2 Washington Zone 19 VA BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2021-07-05   
571-544 3 Washington Zone 19 VA WASHDCDP8MD  079F BANDWIDTH.COM CLEC, LLC - VA 236   2021-02-05   
571-544 4 Washington Zone 19 VA ARTNVAARXBY  965H FRACTEL, LLC 236   2020-09-06   
571-544 5 Washington Zone 19 VA WASKDCFNAMD  6827 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 236   2024-08-14   
571-544 6 Washington Zone 19 VA WASHDCDP8MD  079F BANDWIDTH.COM CLEC, LLC - VA 236   2021-02-05   
571-544 7 Washington Zone 19 VA WASHDCDP8MD  079F BANDWIDTH.COM CLEC, LLC - VA 236   2021-02-05   
571-544 8 Washington Zone 19 VA WASHDCDP8MD  079F BANDWIDTH.COM CLEC, LLC - VA 236   2021-02-05   
571-544 9 Washington Zone 19 VA WASHDCDP8MD  079F BANDWIDTH.COM CLEC, LLC - VA 236   2021-02-05   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.