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: 657 [Rate centres in NPA 657] [Dial plan for NPA 657]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-251 A Garden Grove CA   576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730      
657-251 0 Garden Grove CA   576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2014-05-19   
657-251 1 Garden Grove CA   649C ONVOY, LLC - CA 730   2014-09-14   
657-251 2 Garden Grove CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2014-10-09   
657-251 3 Garden Grove CA   649C ONVOY, LLC - CA 730   2014-12-12   
657-251 4 Garden Grove CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2020-03-08   
657-251 5 Garden Grove CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2020-02-27   
657-251 6 Garden Grove CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2014-11-06   
657-251 7 Garden Grove CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2014-12-10   
657-251 8 Garden Grove CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2014-12-31   
657-251 9 Garden Grove CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2014-10-20   

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.