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: 377

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-377 A Manassas VA WASLDCRGDS0  367E YMAX COMMUNICATIONS CORP. - VA 236      
571-377 0 Manassas VA WASLDCRGDS0  367E YMAX COMMUNICATIONS CORP. - VA 236   2008-10-02   
571-377 1 Manassas VA WASLDCRGDS0  367E YMAX COMMUNICATIONS CORP. - VA 236   2008-10-02   
571-377 2 Manassas VA WASLDCRGDS0  367E YMAX COMMUNICATIONS CORP. - VA 236   2008-10-02   
571-377 3 Manassas VA WASLDCRGDS0  367E YMAX COMMUNICATIONS CORP. - VA 236   2008-10-02   
571-377 4 Manassas VA WASLDCRGDS0  367E YMAX COMMUNICATIONS CORP. - VA 236   2008-10-02   
571-377 5 Manassas VA WASLDCRGDS0  367E YMAX COMMUNICATIONS CORP. - VA 236   2008-10-02   
571-377 6 Manassas VA MNSSVAXADS0  0233 VERIZON SOUTH INC.-VA (CONTEL) 236   2008-10-03   
571-377 7 Manassas VA MNSSVAXADS0  0233 VERIZON SOUTH INC.-VA (CONTEL) 236   2008-10-03   
571-377 8 Manassas VA WASHDCDP8MD  079F BANDWIDTH.COM CLEC, LLC - VA 236   2009-02-13   
571-377 9 Manassas VA WASKDCFNAMD  6827 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 236   2009-02-06   

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.