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: 690

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
510-690 A Hayward CA HYWRCA01DS0  9740 PACIFIC BELL 722      
510-690 0 Hayward CA HYWRCA01DS0  9740 PACIFIC BELL 722      
510-690 1 Hayward CA HYWRCA01DS0  9740 PACIFIC BELL 722      
510-690 2 Hayward CA HYWRCA01DS0  9740 PACIFIC BELL 722      
510-690 3 Hayward CA OKLECAZVGT0  5562 METROPCS, INC. 722   2005-11-03   
510-690 4 Hayward CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722   2005-12-09   
510-690 5 Hayward CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722   2006-07-13   
510-690 6 Hayward CA HYWRCA01DS0  9740 PACIFIC BELL 722      
510-690 7 Hayward CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2006-09-02   
510-690 8 Hayward CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2007-09-07   
510-690 9 Hayward CA HYWRCA01DS0  9740 PACIFIC BELL 722      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.