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: 408 [Rate centres in NPA 408] [Dial plan for NPA 408]

NXX: 543

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
408-543 A Sunnyvale CA SNVACA11DS0  9740 PACIFIC BELL 722      
408-543 0 Sunnyvale CA SNVACA11DS0  9740 PACIFIC BELL 722      
408-543 1 Sunnyvale CA SNVACA11DS0  9740 PACIFIC BELL 722      
408-543 2 Sunnyvale CA SNVACA11DS0  9740 PACIFIC BELL 722      
408-543 3 Sunnyvale CA SNVACA11DS0  9740 PACIFIC BELL 722      
408-543 4 Sunnyvale CA SNVACA11DS0  9740 PACIFIC BELL 722      
408-543 5 Sunnyvale CA SNVACA11DS0  9740 PACIFIC BELL 722      
408-543 6 Sunnyvale CA SNVACA11DS0  9740 PACIFIC BELL 722      
408-543 7 Sunnyvale CA SNVACA11DS0  9740 PACIFIC BELL 722      
408-543 8 Sunnyvale CA SNVACA11DS0  9740 PACIFIC BELL 722      
408-543 9 Sunnyvale CA SNFCCAMMDS7  258E YMAX COMMUNICATIONS CORP. - CA 722   2009-08-31   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.