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: 259

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
510-259 A Hayward CA HYWRCA11DS0  9740 PACIFIC BELL 722      
510-259 0 Hayward CA HYWRCA11DS0  9740 PACIFIC BELL 722      
510-259 1 Hayward CA HYWRCA11DS0  9740 PACIFIC BELL 722      
510-259 2 Hayward CA HYWRCA11DS0  9740 PACIFIC BELL 722      
510-259 3 Hayward CA HYWRCA11DS0  9740 PACIFIC BELL 722      
510-259 4 Hayward CA HYWRCA11DS0  9740 PACIFIC BELL 722      
510-259 5 Hayward CA HYWRCA11DS0  9740 PACIFIC BELL 722      
510-259 6 Hayward CA HYWRCA11DS0  9740 PACIFIC BELL 722      
510-259 7 Hayward CA HYWRCA11DS0  9740 PACIFIC BELL 722      
510-259 8 Hayward CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
510-259 9 Hayward CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.