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
510-243 A El Sobrante-Pinole CA ELSBCA11DS0  9740 PACIFIC BELL 722      
510-243 0 El Sobrante-Pinole CA   9740 PACIFIC BELL 722      
510-243 1 El Sobrante-Pinole CA   9740 PACIFIC BELL 722      
510-243 2 El Sobrante-Pinole CA   9740 PACIFIC BELL 722      
510-243 3 El Sobrante-Pinole CA   9740 PACIFIC BELL 722      
510-243 4 El Sobrante-Pinole CA   9740 PACIFIC BELL 722   2002-05-08   
510-243 5 El Sobrante-Pinole CA   7610 COMCAST PHONE OF CALIFORNIA, LLC - CA 722   2011-09-29   
510-243 6 El Sobrante-Pinole CA   9740 PACIFIC BELL 722      
510-243 7 El Sobrante-Pinole CA   9740 PACIFIC BELL 722      
510-243 8 El Sobrante-Pinole CA   9740 PACIFIC BELL 722      
510-243 9 El Sobrante-Pinole CA   9740 PACIFIC BELL 722      

Last updated: Sun, 31 May 2020 11:59:01 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.