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.

Switch: ARTNVAARX8X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
571-260 1 Dale City VA 551G NUSO, LLC 236   2016-10-07   
571-300 8 Dale City VA 551G NUSO, LLC 236   2018-07-31   
571-404 A Braddock VA 551G NUSO, LLC 236      
571-404 1 Braddock VA 551G NUSO, LLC 236   2018-09-04   
571-444 8 Washington Zone 8 VA 551G NUSO, LLC 236   2016-04-01   
571-458 1 Washington Zone 8 VA 551G NUSO, LLC 236   2014-02-06   
571-459 1 Washington Zone 19 VA 551G NUSO, LLC 236   2016-10-07   
571-466 1 Triangle VA 551G NUSO, LLC 236   2016-10-07   
571-486 8 Haymarket VA 551G NUSO, LLC 236   2016-10-07   
571-523 0 Herndon VA 551G NUSO, LLC 236   2018-07-31   
571-525 9 Herndon VA 551G NUSO, LLC 236   2016-10-07   
571-549 5 Braddock VA 551G NUSO, LLC 236   2016-10-07   
571-636 0 Haymarket VA 551G NUSO, LLC 236   2018-07-31   
571-639 0 Arcola VA 551G NUSO, LLC 236   2016-10-07   
571-699 A Washington Zone 8 VA 551G NUSO, LLC 236      
571-699 1 Washington Zone 8 VA 551G NUSO, LLC 236   2013-07-12   
571-775 4 Washington Zone 8 VA 551G NUSO, LLC 236   2016-08-31   
571-775 6 Washington Zone 8 VA 551G NUSO, LLC 236   2016-08-31   
571-775 7 Washington Zone 8 VA 551G NUSO, LLC 236   2016-08-31   
571-800 4 Washington Zone 8 VA 551G NUSO, LLC 236   2016-08-31   
571-800 5 Washington Zone 8 VA 551G NUSO, LLC 236   2016-08-31   
703-223 8 Washington Zone 19 VA 551G NUSO, LLC 236   2018-07-31   
703-420 A Manassas VA 551G NUSO, LLC 236      
703-420 1 Manassas VA 551G NUSO, LLC 236   2016-11-11   
703-687 0 Leesburg VA 551G NUSO, LLC 246   2016-10-07   
703-688 8 Lorton VA 551G NUSO, LLC 236   2016-10-07   
703-783 9 Engleside VA 551G NUSO, LLC 236   2016-10-07   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.