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: 833

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-833 A Manassas VA MCLNVA23DS4  8825 LEVEL 3 COMMUNICATIONS, LLC - VA 236      
571-833 0 Manassas VA VINNVACBDS0  138E ONVOY, LLC - VA 236   2019-06-10   
571-833 1 Manassas VA VINNVACBDS0  138E ONVOY, LLC - VA 236   2019-06-10   
571-833 2 Manassas VA VINNVACBDS0  138E ONVOY, LLC - VA 236   2019-06-10   
571-833 3 Manassas VA ARTNVAARDS2  275G PEERLESS NETWORK OF VIRGINIA, LLC - VA 236   2019-05-26   
571-833 4 Manassas VA VINNVACBDS0  138E ONVOY, LLC - VA 236   2019-06-10   
571-833 5 Manassas VA WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2019-05-31   
571-833 6 Manassas VA MCLNVA23DS4  8825 LEVEL 3 COMMUNICATIONS, LLC - VA 236   2019-05-19   
571-833 7 Manassas VA MCLNVA23DS4  8825 LEVEL 3 COMMUNICATIONS, LLC - VA 236   2019-05-19   
571-833 8 Manassas VA BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2019-08-27   
571-833 9 Manassas VA VINNVACBDS0  138E ONVOY, LLC - VA 236   2019-10-24   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.