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: 665

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
510-665 A Oakland: Berkeley DA CA BKLYCA01DS0  9740 PACIFIC BELL 722      
510-665 0 Oakland: Berkeley DA CA BKLYCA01DS0  9740 PACIFIC BELL 722      
510-665 1 Oakland: Berkeley DA CA BKLYCA01DS0  9740 PACIFIC BELL 722      
510-665 2 Oakland: Berkeley DA CA BKLYCA01DS0  9740 PACIFIC BELL 722      
510-665 3 Oakland: Berkeley DA CA BKLYCA01DS0  9740 PACIFIC BELL 722      
510-665 4 Oakland: Berkeley DA CA BKLYCA01DS0  9740 PACIFIC BELL 722      
510-665 5 Oakland: Berkeley DA CA BKLYCA01DS0  9740 PACIFIC BELL 722      
510-665 6 Oakland: Berkeley DA CA BKLYCA01DS0  9740 PACIFIC BELL 722      
510-665 7 Oakland: Berkeley DA CA BKLYCA01DS0  9740 PACIFIC BELL 722      
510-665 8 Oakland: Berkeley DA CA BKLYCA01DS0  9740 PACIFIC BELL 722      
510-665 9 Oakland: Berkeley DA CA   145J TERRA NOVA TELECOM INC. 722   2021-10-27   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.