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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-574 9 Ellicott City MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-575 A Arbutus MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-575 0 Arbutus MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-575 1 Arbutus MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-575 2 Arbutus MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-575 3 Arbutus MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-575 4 Arbutus MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238   2006-11-09   
443-575 5 Arbutus MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-575 6 Arbutus MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-04-10   
443-575 7 Arbutus MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238   2011-12-20   
443-575 8 Arbutus MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-575 9 Arbutus MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-23   
443-576 A Randallstown MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-576 0 Randallstown MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-576 1 Randallstown MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-576 2 Randallstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-14   
443-576 3 Randallstown MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-576 4 Randallstown MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-576 5 Randallstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-14   
443-576 6 Randallstown MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-06-26   
443-576 8 Randallstown MD   515J IP HORIZON LLC 238   2016-01-04   
443-576 9 Randallstown MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-25   
443-577 A Glen Burnie MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-577 0 Glen Burnie MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-577 1 Glen Burnie MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-577 2 Glen Burnie MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-577 3 Glen Burnie MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-577 4 Glen Burnie MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-20   
443-577 5 Glen Burnie MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238   2005-01-08   
443-577 6 Glen Burnie MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-11-24   
443-577 7 Glen Burnie MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-577 8 Glen Burnie MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2016-07-14   
443-577 9 Glen Burnie MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-578 A Cockeysville MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238      
443-578 0 Cockeysville MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238      
443-578 1 Cockeysville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2014-10-21   
443-578 2 Cockeysville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2015-10-26   
443-578 3 Cockeysville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-02-27   
443-578 4 Cockeysville MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238      
443-578 5 Cockeysville MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238      
443-578 6 Cockeysville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2013-08-15   
443-578 7 Cockeysville MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-578 8 Cockeysville MD PIVLMDPKFMD  9170 BROADVIEW NETWORKS, INC. - MD 238   2008-09-26   
443-578 9 Cockeysville MD   515J IP HORIZON LLC 238   2015-03-23   
443-579 A Essex MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-579 0 Essex MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-579 1 Essex MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-579 2 Essex MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-579 3 Essex MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-579 4 Essex MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-06-26   
443-579 5 Essex MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-579 6 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-07-17   
443-579 7 Essex MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-579 8 Essex MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-02-26   
443-579 9 Essex MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-580 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2024-02-09   
443-580 0 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 1 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 2 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 6 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-04-13   
443-580 7 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 8 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 9 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-581 A Chase MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-581 0 Chase MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
443-581 1 Chase MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
443-581 3 Chase MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-09-12   
443-581 5 Chase MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-581 6 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
443-581 7 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
443-581 8 Chase MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2019-07-06   
443-581 9 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-582 A Churchville MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-582 0 Churchville MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
443-582 1 Churchville MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-582 2 Churchville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
443-582 3 Churchville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-05-29   
443-582 4 Churchville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-582 5 Churchville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-582 6 Churchville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
443-582 7 Churchville MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-28   
443-582 8 Churchville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-07-28   
443-582 9 Churchville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-05-31   
443-583 A Columbia MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-583 0 Columbia MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-03   
443-583 1 Columbia MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-583 2 Columbia MD BLTMMD91DS2  2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2016-01-31   
443-583 3 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-583 4 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-583 5 Columbia MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-01   
443-583 6 Columbia MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2015-05-29   
443-583 7 Columbia MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-09-16   
443-583 8 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-583 9 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-11-08   
443-584 A Crofton MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-584 0 Crofton MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-22   
443-584 1 Crofton MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      

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Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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