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: 475

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-475 A Braddock VA WASHDC125MD  197D VONAGE AMERICA LLC 236      
571-475 0 Braddock VA   275G PEERLESS NETWORK OF VIRGINIA, LLC - VA 236   2020-06-30   
571-475 1 Braddock VA   275G PEERLESS NETWORK OF VIRGINIA, LLC - VA 236   2020-11-01   
571-475 2 Braddock VA   624H ONVOY SPECTRUM, LLC 236   2021-05-21   
571-475 3 Braddock VA   197D VONAGE AMERICA LLC 236   2020-06-28   
571-475 4 Braddock VA   138E ONVOY, LLC - VA 236   2020-07-04   
571-475 5 Braddock VA   138E ONVOY, LLC - VA 236   2020-07-04   
571-475 6 Braddock VA   138E ONVOY, LLC - VA 236   2020-07-04   
571-475 7 Braddock VA   197D VONAGE AMERICA LLC 236   2020-06-28   
571-475 8 Braddock VA   138E ONVOY, LLC - VA 236   2020-08-20   
571-475 9 Braddock VA   138E ONVOY, LLC - VA 236   2020-08-20   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.