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: 684

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
925-684 A East Contra Costa CA BTISCA11RS0  9740 PACIFIC BELL 722      
925-684 0 East Contra Costa CA BTISCA11RS0  9740 PACIFIC BELL 722      
925-684 1 East Contra Costa CA BTISCA11RS0  9740 PACIFIC BELL 722      
925-684 2 East Contra Costa CA BTISCA11RS0  9740 PACIFIC BELL 722      
925-684 3 East Contra Costa CA BTISCA11RS0  9740 PACIFIC BELL 722      
925-684 4 East Contra Costa CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2007-05-03   
925-684 5 East Contra Costa CA SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722   2006-05-22   
925-684 6 East Contra Costa CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2013-03-29   
925-684 7 East Contra Costa CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2010-05-10   
925-684 8 East Contra Costa CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-03-11   
925-684 9 East Contra Costa CA BTISCA11RS0  9740 PACIFIC BELL 722      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.