Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 408 [Rate centres in NPA 408] [Dial plan for NPA 408]

NXX: 617

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
408-617 A Sunnyvale CA SNVACA01DS1  9740 PACIFIC BELL 722      
408-617 0 Sunnyvale CA SNVACA01DS1  9740 PACIFIC BELL 722      
408-617 1 Sunnyvale CA SNVACA01DS1  9740 PACIFIC BELL 722      
408-617 2 Sunnyvale CA SNVACA01DS1  9740 PACIFIC BELL 722      
408-617 3 Sunnyvale CA SNVACA01DS1  9740 PACIFIC BELL 722      
408-617 4 Sunnyvale CA   829J PAETEC ITEL, LLC 722   2016-05-06   
408-617 5 Sunnyvale CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-12-21   
408-617 6 Sunnyvale CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2025-04-05   
408-617 7 Sunnyvale CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-12-21   
408-617 8 Sunnyvale CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-22   
408-617 9 Sunnyvale CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-22   

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

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