Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 510 [Rate centres in NPA 510] [Dial plan for NPA 510]

NXX: 497

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
510-497 A Fremont-Newark: Oliver DA CA HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      
510-497 0 Fremont-Newark: Oliver DA CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2010-06-21   
510-497 1 Fremont-Newark: Oliver DA CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2014-10-10   
510-497 2 Fremont-Newark: Oliver DA CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      
510-497 3 Fremont-Newark: Oliver DA CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      
510-497 4 Fremont-Newark: Oliver DA CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2014-10-10   
510-497 5 Fremont-Newark: Oliver DA CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      
510-497 6 Fremont-Newark: Oliver DA CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      
510-497 7 Fremont-Newark: Oliver DA CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      
510-497 8 Fremont-Newark: Oliver DA CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      
510-497 9 Fremont-Newark: Oliver DA CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      

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

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