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.

Santa Clarita: Newhall-Castaic DA, CA

<< 1 2 3 4 5 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
661-310 9 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
661-312 A TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
661-312 0 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
661-312 1 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
661-312 2 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
661-312 3 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
661-312 4 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
661-312 5 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
661-312 6 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
661-312 7 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
661-312 8 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
661-312 9 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
661-362 A   829J PAETEC ITEL, LLC 730      
661-362 0   829J PAETEC ITEL, LLC 730      
661-362 1   829J PAETEC ITEL, LLC 730      
661-362 2   829J PAETEC ITEL, LLC 730      
661-362 3   829J PAETEC ITEL, LLC 730      
661-362 4   829J PAETEC ITEL, LLC 730      
661-362 5   829J PAETEC ITEL, LLC 730      
661-362 6   829J PAETEC ITEL, LLC 730      
661-362 7   829J PAETEC ITEL, LLC 730      
661-362 8 LSANCARCD3S  649C ONVOY, LLC - CA 730   2012-12-31   
661-362 9 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2022-10-16   
661-373 A TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
661-383 A CSTCCA11DS0  9740 PACIFIC BELL 730      
661-383 0 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2015-05-21   
661-383 1 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2015-05-21   
661-383 2 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2015-05-21   
661-383 3 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2015-07-23   
661-383 4 CSTCCA11DS0  9740 PACIFIC BELL 730   2015-03-19   
661-383 5 CSTCCA11DS0  9740 PACIFIC BELL 730   2015-03-19   
661-383 6 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2015-08-16   
661-383 7 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2015-05-19   
661-383 8 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2016-04-25   
661-383 9 SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2015-04-27   
661-388 A SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730      
661-388 0 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2011-05-27   
661-388 1 CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2011-01-03   
661-388 2 BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2011-01-26   
661-388 3 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2011-04-01   
661-388 4 SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2010-09-30   
661-388 5 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2011-05-27   
661-388 6 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2011-04-01   
661-388 7 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2011-07-13   
661-388 8 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2011-02-08   
661-388 9 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2011-07-03   
661-414 A ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
661-414 0 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2005-08-07   
661-414 1 ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
661-414 2 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2005-10-07   
661-414 3 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2013-03-22   
661-414 4 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2005-08-02   
661-414 5 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2005-10-02   
661-414 6 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2005-08-02   
661-414 7 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2005-10-02   
661-414 8 BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2008-06-12   
661-414 9   829J PAETEC ITEL, LLC 730   2007-10-05   
661-417 A TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
661-417 0 LSANCARCD3S  649C ONVOY, LLC - CA 730   2018-01-20   
661-417 1 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2018-05-05   
661-417 2 LSANCARCD3S  649C ONVOY, LLC - CA 730   2019-03-03   
661-417 3 LSANCARCD3S  649C ONVOY, LLC - CA 730   2019-03-03   
661-417 4 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2019-02-15   
661-417 5 LNBHCAAXDS0  707H INTEGRATED PATH COMMUNICATIONS, LLC - CA 730   2018-05-08   
661-417 6 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2018-09-21   
661-417 7 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2017-12-30   
661-417 8 SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2017-09-29   
661-417 9 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2017-08-21   
661-425 A LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730      
661-425 0 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2014-05-18   
661-425 1 CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2014-05-20   
661-425 2 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2014-08-25   
661-425 3 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2014-11-08   
661-425 4 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2014-09-15   
661-425 5 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2019-06-14   
661-425 6 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2014-07-17   
661-425 7 SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2015-08-27   
661-425 8 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2014-12-29   
661-425 9 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2014-05-20   
661-442 A BLPKCAAFCM0  0051 SHELCOMM 730      
661-476 A BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
661-476 0 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2006-08-07   
661-476 1 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2006-09-23   
661-476 2 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2007-04-26   
661-476 3   829J PAETEC ITEL, LLC 730   2007-06-11   
661-476 4 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2006-12-29   
661-476 5 SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2007-01-10   
661-476 6 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2006-08-07   
661-476 7 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2007-01-29   
661-476 8 TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2007-08-10   
661-476 9 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2007-08-16   
661-481 A LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730      
661-481 0 SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-08-22   
661-481 1 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2014-02-17   
661-481 2 IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2013-10-25   
661-481 3 LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2013-04-30   
661-481 4 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2013-12-20   
661-481 5 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2014-03-21   
661-481 6 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2014-03-17   
661-481 7 LSANCARCD3S  649C ONVOY, LLC - CA 730   2013-09-22   

<< 1 2 3 4 5 >>

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.