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.

Lomita, CA

1 2 3 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
310-257 A LOMTCA11DS0  9740 PACIFIC BELL 730      
310-304 A LSANCARCD3S  649C ONVOY, LLC - CA 730      
310-304 0 LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-26   
310-304 1 LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-26   
310-304 2 LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-26   
310-304 3 LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-26   
310-304 4 LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-26   
310-304 5 LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-26   
310-304 6 LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-26   
310-304 7 LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-26   
310-304 8 LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-26   
310-304 9 LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-26   
310-325 A LOMTCA11DS0  9740 PACIFIC BELL 730      
310-326 A LOMTCA11DS0  9740 PACIFIC BELL 730      
310-517 A LOMTCA11DS0  9740 PACIFIC BELL 730      
310-530 A LOMTCA11DS0  9740 PACIFIC BELL 730      
310-534 A LOMTCA11DS0  9740 PACIFIC BELL 730      
310-539 A LOMTCA11DS0  9740 PACIFIC BELL 730      
310-602 A BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730      
310-602 0 BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730      
310-602 1   145J TERRA NOVA TELECOM INC. 730   2022-10-03   
310-602 2 GRDNCA02KMD  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2002-10-27   
310-602 3 IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2012-01-12   
310-602 4 LSANCA03DS7  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2002-04-12   
310-602 5 IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2000-04-11   
310-602 6 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2003-02-11   
310-602 7 ANHMCAHLDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2003-05-04   
310-602 8 ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730   2000-04-10   
310-602 9 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2004-11-12   
310-626 A LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
310-626 0 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
310-626 1 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2011-06-23   
310-626 2 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2004-03-02   
310-626 3 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2003-06-03   
310-626 4 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2003-01-11   
310-626 5 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2004-05-09   
310-626 6 IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2003-04-11   
310-626 7 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2004-08-28   
310-626 8 BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2000-05-09   
310-626 9   829J PAETEC ITEL, LLC 730   2002-06-17   
310-784 A LOMTCA11DS0  9740 PACIFIC BELL 730      
310-891 A LOMTCA11DS0  9740 PACIFIC BELL 730      
310-986 A TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
310-986 0 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2005-02-24   
310-986 1 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2005-02-24   
310-986 2 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2005-02-25   
310-986 3 LSANCARCD3S  649C ONVOY, LLC - CA 730   2005-07-07   
310-986 4 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2005-07-21   
310-986 5 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2005-08-25   
310-986 6   829J PAETEC ITEL, LLC 730   2011-06-21   
310-986 7 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2005-08-25   
310-986 8 LSANCARCD3S  649C ONVOY, LLC - CA 730   2022-08-13   
310-986 9 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2005-06-05   
310-997 A BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
310-997 0 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2005-12-10   
310-997 1 LSANCARCD3S  649C ONVOY, LLC - CA 730   2005-11-10   
310-997 2 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2006-07-06   
310-997 3 BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2005-11-11   
310-997 4 LSANCARCD3S  649C ONVOY, LLC - CA 730   2016-11-26   
310-997 5 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2006-06-19   
310-997 6 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2006-02-09   
310-997 7 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2012-07-11   
310-997 8 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2006-02-09   
310-997 9 ANHMCA01XRY  318J COMCAST IP PHONE, LLC 730   2006-03-13   
424-203 A BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730      
424-203 0 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2007-11-19   
424-203 1   829J PAETEC ITEL, LLC 730   2007-07-26   
424-203 2 BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2007-01-25   
424-203 3 BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2007-03-02   
424-203 4 LSANCARCD3S  649C ONVOY, LLC - CA 730   2008-03-26   
424-203 5 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2007-03-04   
424-203 6 LSANCARCD3S  649C ONVOY, LLC - CA 730   2012-12-30   
424-203 7 IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2007-03-10   
424-203 8 IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2007-03-10   
424-203 9 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2007-03-06   
424-222 A TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
424-222 0 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2007-05-11   
424-222 1 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2007-05-11   
424-222 2 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2007-05-11   
424-222 3 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2007-05-11   
424-222 4 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2016-10-30   
424-222 5 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2009-04-10   
424-222 6 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2008-08-10   
424-222 7 LSANCARCD3S  649C ONVOY, LLC - CA 730   2008-06-05   
424-222 8 LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2013-05-03   
424-222 9 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2008-11-19   
424-250 A LSANCARCD3S  649C ONVOY, LLC - CA 730      
424-250 0 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-02-27   
424-250 1 LSANCARCD3S  649C ONVOY, LLC - CA 730   2009-07-06   
424-250 2 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-06-20   
424-250 3 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-10-28   
424-250 4   515J IP HORIZON LLC 730   2009-10-09   
424-250 5 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2010-06-10   
424-250 6 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-11-01   
424-250 7 LSANCARCD3S  649C ONVOY, LLC - CA 730   2010-11-23   
424-250 8 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2011-02-17   
424-250 9 SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2012-04-06   
424-251 A BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
424-251 0   829J PAETEC ITEL, LLC 730   2010-03-26   
424-251 1 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2010-09-27   

1 2 3 >>

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.