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:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
510-227 A Oakland: Alameda DA CA WNCKCAGEDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
510-227 0 Oakland: Alameda DA CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2008-05-05   
510-227 1 Oakland: Alameda DA CA   4733 PAETEC COMMUNICATIONS, INC. - CA 722   2009-12-22   
510-227 2 Oakland: Alameda DA CA   649C ONVOY, LLC - CA 722   2007-09-07   
510-227 3 Oakland: Alameda DA CA   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
510-227 4 Oakland: Alameda DA CA   5562 METRO PCS, INC. 722   2008-08-11   
510-227 5 Oakland: Alameda DA CA   7610 COMCAST PHONE OF CALIFORNIA, LLC - CA 722   2005-09-27   
510-227 6 Oakland: Alameda DA CA   7262 XO CALIFORNIA, INC. 722   2009-07-13   
510-227 7 Oakland: Alameda DA CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2011-04-02   
510-227 8 Oakland: Alameda DA CA   649C ONVOY, LLC - CA 722   2006-03-10   
510-227 9 Oakland: Alameda DA CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2007-12-09   

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.