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
661-578 2 Bakersfield: Main DA CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2007-04-06   
661-578 3 Bakersfield: Main DA CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2007-04-06   
661-578 4 Bakersfield: Main DA CA BKFDCA01X2X  5562 METROPCS, INC. 734   2008-09-04   
661-578 5 Bakersfield: Main DA CA BKFDCA119MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 734   2006-03-17   
661-578 6 Bakersfield: Main DA CA BKFDCA119MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 734   2006-03-17   
661-578 7 Bakersfield: Main DA CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2007-04-06   
661-578 8 Bakersfield: Main DA CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2007-04-06   
661-578 9 Bakersfield: Main DA CA BKFDCA01X2X  5562 METROPCS, INC. 734   2008-09-04   
661-579 A Lancaster CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2024-01-23   
661-579 0 Lancaster CA SNMNCAXP2MD  793K TWC IP ENABLED SERVICES, LLC 730   2010-08-30   
661-579 1 Lancaster CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2010-03-06   
661-579 2 Lancaster CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2008-10-16   
661-579 3 Lancaster CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-07-02   
661-579 4 Lancaster CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-07-02   
661-579 5 Lancaster CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2011-05-08   
661-579 6 Lancaster CA SNMNCAXP2MD  793K TWC IP ENABLED SERVICES, LLC 730   2009-02-04   
661-579 7 Lancaster CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2008-08-01   
661-579 8 Lancaster CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2008-09-04   
661-579 9 Lancaster CA SNMNCAXP2MD  793K TWC IP ENABLED SERVICES, LLC 730   2009-03-22   
661-580 A Palmdale: Palmdale DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
661-580 0 Palmdale: Palmdale DA CA LSANCARC32Z  073H TELNYX LLC 730   2021-11-07   
661-580 1 Palmdale: Palmdale DA CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2021-11-07   
661-580 2 Palmdale: Palmdale DA CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2021-11-07   
661-580 3 Palmdale: Palmdale DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-10-17   
661-580 4 Palmdale: Palmdale DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-10-17   
661-580 5 Palmdale: Palmdale DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-10-17   
661-580 6 Palmdale: Palmdale DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-10-17   
661-580 7 Palmdale: Palmdale DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-10-17   
661-580 8 Palmdale: Palmdale DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-10-17   
661-580 9 Palmdale: Palmdale DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-10-17   
661-581 A Palmdale: Palmdale DA CA GRDNCA02KMD  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
661-581 0 Palmdale: Palmdale DA CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-04-15   
661-581 1 Palmdale: Palmdale DA CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2022-01-29   
661-581 2 Palmdale: Palmdale DA CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2022-01-29   
661-581 3 Palmdale: Palmdale DA CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-10-21   
661-581 4 Palmdale: Palmdale DA CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-11-21   
661-581 5 Palmdale: Palmdale DA CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2022-09-09   
661-581 6 Palmdale: Palmdale DA CA GRDNCA02KMD  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2021-12-17   
661-581 7 Palmdale: Palmdale DA CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2022-09-09   
661-581 8 Palmdale: Palmdale DA CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-06-20   
661-581 9 Palmdale: Palmdale DA CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2022-09-17   
661-582 A Lancaster CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
661-582 0 Lancaster CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2017-06-11   
661-582 1 Lancaster CA   145J TERRA NOVA TELECOM INC. 730   2021-04-28   
661-582 2 Lancaster CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2016-10-13   
661-582 3 Lancaster CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2015-12-06   
661-582 4 Lancaster CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2016-03-11   
661-582 5 Lancaster CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2016-03-11   
661-582 6 Lancaster CA SNMNCAXP2MD  793K TWC IP ENABLED SERVICES, LLC 730   2016-06-10   
661-582 7 Lancaster CA NHLLCA01DS0  7480 PACIFIC BELL (COMPETITIVE) 730   2016-06-15   

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

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