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: 510 [Rate centres in NPA 510] [Dial plan for NPA 510]

NXX: 831

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
510-831 A Richmond CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
510-831 0 Richmond CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
510-831 1 Richmond CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
510-831 2 Richmond CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
510-831 3 Richmond CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
510-831 4 Richmond CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
510-831 5 Richmond CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
510-831 6 Richmond CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
510-831 7 Richmond CA SNFCCA21XNZ  624H ONVOY SPECTRUM, LLC 722      
510-831 8 Richmond CA   145J TERRA NOVA TELECOM INC. 722      
510-831 9 Richmond CA SNFCCA21XNZ  624H ONVOY SPECTRUM, LLC 722      

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.