Local Calling Guide

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NPA: 661 [Rate centres in NPA 661] [Dial plan for NPA 661]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-673 8 Santa Clarita: Saugus Canyon Country DA CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2009-06-11   
661-673 9 Santa Clarita: Saugus Canyon Country DA CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2012-12-30   
661-674 A Lancaster CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
661-674 0 Lancaster CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2011-05-08   
661-674 1 Lancaster CA   515J IP HORIZON LLC 730      
661-674 2 Lancaster CA   515J IP HORIZON LLC 730      
661-674 3 Lancaster CA ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730   2010-08-18   
661-674 4 Lancaster CA   515J IP HORIZON LLC 730      
661-674 5 Lancaster CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2004-06-02   
661-674 6 Lancaster CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2003-12-14   
661-674 7 Lancaster CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2003-04-05   
661-674 8 Lancaster CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2004-04-21   
661-674 9 Lancaster CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2003-04-05   
661-675 A Palmdale: Palmdale DA CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
661-675 0 Palmdale: Palmdale DA CA   515J IP HORIZON LLC 730      
661-675 1 Palmdale: Palmdale DA CA   515J IP HORIZON LLC 730      
661-675 2 Palmdale: Palmdale DA CA   515J IP HORIZON LLC 730      
661-675 3 Palmdale: Palmdale DA CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2009-08-20   
661-675 4 Palmdale: Palmdale DA CA   515J IP HORIZON LLC 730      
661-675 5 Palmdale: Palmdale DA CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2004-04-03   
661-675 6 Palmdale: Palmdale DA CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2004-04-03   
661-675 7 Palmdale: Palmdale DA CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2004-07-05   
661-675 8 Palmdale: Palmdale DA CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2004-07-05   
661-675 9 Palmdale: Palmdale DA CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2004-09-09   
661-676 A Lancaster CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-05-05   
661-676 0 Lancaster CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-05-05   
661-676 1 Lancaster CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-05-05   
661-676 2 Lancaster CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-05-05   
661-676 3 Lancaster CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2026-01-23   
661-676 4 Lancaster CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-08-22   
661-676 5 Lancaster CA SNMNCAXPX2Z  624H ONVOY SPECTRUM, LLC 730   2025-05-16   
661-676 6 Lancaster CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2026-03-27   
661-676 7 Lancaster CA SNMNCAXPX2Z  624H ONVOY SPECTRUM, LLC 730   2025-05-16   
661-676 8 Lancaster CA SNMNCAXPX2Z  624H ONVOY SPECTRUM, LLC 730   2025-05-16   
661-677 A Bakersfield: North DA CA BKFDCAKTX6X  965H FRACTEL, LLC 734      
661-677 0 Bakersfield: North DA CA BKFDCAKTDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 734   2020-04-09   
661-677 1 Bakersfield: North DA CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2021-05-19   
661-677 2 Bakersfield: North DA CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2021-05-19   
661-677 3 Bakersfield: North DA CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2021-05-19   
661-677 4 Bakersfield: North DA CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2021-03-31   
661-677 5 Bakersfield: North DA CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2021-03-31   
661-677 6 Bakersfield: North DA CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2020-11-14   
661-677 7 Bakersfield: North DA CA BKFDCAKTX6X  965H FRACTEL, LLC 734   2020-02-25   
661-677 8 Bakersfield: North DA CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2020-11-14   
661-677 9 Bakersfield: North DA CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2020-06-25   
661-678 A Santa Clarita: Newhall-Castaic DA CA SHOKCA02DS2  7421 AT&T - LOCAL 730      
661-678 0 Santa Clarita: Newhall-Castaic DA CA ANHMCA01XEY  516C AT&T CORP. 730   2011-08-31   
661-678 1 Santa Clarita: Newhall-Castaic DA CA LSANCA03DS3  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2010-03-12   
661-678 2 Santa Clarita: Newhall-Castaic DA CA SHOKCA02DS2  7421 AT&T - LOCAL 730      
661-678 3 Santa Clarita: Newhall-Castaic DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2006-03-09   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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