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: 603

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-603 A Washington Zone 17 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
571-603 0 Washington Zone 17 VA WASHDC12NMD  490J DISH WIRELESS, LLC 236      
571-603 1 Washington Zone 17 VA BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
571-603 2 Washington Zone 17 VA WASHDC12NMD  490J DISH WIRELESS, LLC 236      
571-603 3 Washington Zone 17 VA BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
571-603 4 Washington Zone 17 VA BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
571-603 5 Washington Zone 17 VA WASKDCFNAMD  6827 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 236      
571-603 6 Washington Zone 17 VA VINNVACBDS0  138E ONVOY, LLC - VA 236      
571-603 7 Washington Zone 17 VA VINNVACBDS0  138E ONVOY, LLC - VA 236      
571-603 8 Washington Zone 17 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
571-603 9 Washington Zone 17 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.