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: 925 [Rate centres in NPA 925] [Dial plan for NPA 925]

NXX: 356

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
925-356 A Concord CA CNCRCA01DS1  9740 PACIFIC BELL 722      
925-356 0 Concord CA CNCRCA01DS1  9740 PACIFIC BELL 722      
925-356 1 Concord CA CNCRCADOCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
925-356 2 Concord CA CNCRCA01DS1  9740 PACIFIC BELL 722      
925-356 3 Concord CA CNCRCA01DS1  9740 PACIFIC BELL 722      
925-356 4 Concord CA CNCRCA01DS1  9740 PACIFIC BELL 722      
925-356 5 Concord CA CNCRCA01DS1  9740 PACIFIC BELL 722      
925-356 6 Concord CA CNCRCA01DS1  9740 PACIFIC BELL 722      
925-356 7 Concord CA CNCRCA01DS1  9740 PACIFIC BELL 722      
925-356 8 Concord CA CNCRCA01DS1  9740 PACIFIC BELL 722      
925-356 9 Concord CA CNCRCA01DS1  9740 PACIFIC BELL 722      

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.