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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
443-692 9 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-693 A Perryville MD BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-693 0 Perryville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-11-19   
443-693 1 Perryville MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2004-02-05   
443-693 2 Perryville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2005-09-01   
443-693 3 Perryville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2005-05-02   
443-693 4 Perryville MD PIVLMDPKXHX  829J PAETEC ITEL, LLC 238   2008-05-05   
443-693 5 Perryville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-05   
443-693 6 Perryville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2024-11-12   
443-693 7 Perryville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-693 8 Perryville MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2006-04-07   
443-693 9 Perryville MD BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-694 A Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 0 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2005-03-08   
443-694 1 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 2 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2005-01-18   
443-694 3 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 4 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 5 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 6 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 7 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 8 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2006-04-03   
443-694 9 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-695 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-696 A Dundalk MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-696 0 Dundalk MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-696 1 Dundalk MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-11-25   
443-696 2 Dundalk MD   145J TERRA NOVA TELECOM INC. 238   2024-09-11   
443-696 3 Dundalk MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-696 4 Dundalk MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-696 5 Dundalk MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-11-25   
443-696 6 Dundalk MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-22   
443-696 7 Dundalk MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-696 8 Dundalk MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-09-23   
443-696 9 Dundalk MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-697 A Catonsville MD BLTMMDDN4MD  2554 GLOBAL NAPS SOUTH, INC. - MD 238      
443-698 A Odenton MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-698 0 Odenton MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-698 1 Odenton MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2005-11-11   
443-698 2 Odenton MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2013-06-14   
443-698 3 Odenton MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2016-08-25   
443-698 4 Odenton MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2019-12-28   
443-698 5 Odenton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-03-01   
443-698 6 Odenton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-03-01   
443-698 7 Odenton MD   145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-698 8 Odenton MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-02   
443-698 9 Odenton MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-699 A Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-699 0 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-07   
443-699 1 Annapolis MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-11-13   

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

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