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: 397

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
510-397 A Hayward CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722      
510-397 0 Hayward CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2008-10-11   
510-397 1 Hayward CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2008-10-11   
510-397 2 Hayward CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2008-10-11   
510-397 3 Hayward CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2008-10-18   
510-397 4 Hayward CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2008-10-18   
510-397 5 Hayward CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2008-10-18   
510-397 6 Hayward CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2009-08-06   
510-397 7 Hayward CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2010-04-22   
510-397 8 Hayward CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2009-01-13   
510-397 9 Hayward CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2009-01-13   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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