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.

Los Angeles: DA 04, CA

<< 1 2 3 4 5 6 7 8 9 10 11 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
323-409 9 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2015-07-26   
323-441 A LSANCA23DS0  9740 PACIFIC BELL 730      
323-441 0 LSANCA23DS0  9740 PACIFIC BELL 730      
323-441 1 LSANCA23DS0  9740 PACIFIC BELL 730      
323-441 2 LSANCA23DS0  9740 PACIFIC BELL 730      
323-441 3 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2015-08-12   
323-441 4 LSANCA23DS0  9740 PACIFIC BELL 730      
323-441 5 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2007-02-23   
323-441 6 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2014-06-15   
323-441 7 LSANCA23DS0  9740 PACIFIC BELL 730      
323-441 8 LSANCA23DS0  9740 PACIFIC BELL 730      
323-441 9 LSANCA23DS0  9740 PACIFIC BELL 730      
323-442 A LSANCAIKRS1  7534 FRONTIER CALIFORNIA INC. 730      
323-442 0 LSANCAIKRS1  7534 FRONTIER CALIFORNIA INC. 730   2001-09-27   
323-442 1 LSANCAIKRS1  7534 FRONTIER CALIFORNIA INC. 730      
323-442 2 LSANCAIKRS1  7534 FRONTIER CALIFORNIA INC. 730      
323-442 3 LSANCAIKRS1  7534 FRONTIER CALIFORNIA INC. 730      
323-442 4 LSANCAIKRS1  7534 FRONTIER CALIFORNIA INC. 730      
323-442 5 LSANCAIKRS1  7534 FRONTIER CALIFORNIA INC. 730      
323-442 6 LSANCAIKRS1  7534 FRONTIER CALIFORNIA INC. 730      
323-442 7 LSANCAIKRS1  7534 FRONTIER CALIFORNIA INC. 730      
323-442 8 LSANCAIKRS1  7534 FRONTIER CALIFORNIA INC. 730      
323-442 9 GRDNCA02KMD  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
323-505 A IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
323-505 0 IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
323-505 1 LSANCARCDS1  993B CURATEL, LLC - CA 730   2009-08-21   
323-505 2 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2014-06-15   
323-505 3 IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
323-505 4 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2012-02-25   
323-505 5 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2007-05-28   
323-505 6 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2014-06-15   
323-505 7 ANHMCA01XEY  516C AT&T CORP. 730   2006-07-07   
323-505 8 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2015-07-26   
323-505 9 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2014-06-15   
323-539 A LSANCA23DS0  9740 PACIFIC BELL 730      
323-539 0 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2007-04-05   
323-539 1 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2015-08-12   
323-539 2 LSANCA23DS0  9740 PACIFIC BELL 730      
323-539 3 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2013-06-07   
323-539 4 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2014-08-16   
323-539 5 LSANCARC80Z  9262 UTILITY TELECOM GROUP, LLC - CA 730   2006-05-25   
323-539 6 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2006-12-29   
323-539 7 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2014-08-16   
323-539 8 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2014-08-16   
323-539 9 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2016-08-18   
323-576 A LSANCARCD3S  649C ONVOY, LLC - CA 730      
323-576 0 LSANCARCD3S  649C ONVOY, LLC - CA 730      
323-576 1 IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
323-576 2 SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-08-22   
323-576 3 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730      

<< 1 2 3 4 5 6 7 8 9 10 11 >>

Last updated: Sat, 02 May 2026 12:20:53 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.