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: 444

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-444 A Placentia CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730      
657-444 0 Placentia CA LSANCAJWDS5  258E YMAX COMMUNICATIONS CORP. - CA 730   2011-04-17   
657-444 1 Placentia CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2013-10-29   
657-444 2 Placentia CA ANHMCA01XEY  516C AT&T CORP. 730   2011-11-04   
657-444 3 Placentia CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2019-03-03   
657-444 4 Placentia CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-10-18   
657-444 5 Placentia CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-10-29   
657-444 6 Placentia CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2010-10-31   
657-444 7 Placentia CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-12-05   
657-444 8 Placentia CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2013-04-12   
657-444 9 Placentia CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-08-22   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.