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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
443-696 0 Dundalk MD   829J PAETEC ITEL, LLC 238      
443-696 1 Dundalk MD   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   829J PAETEC ITEL, LLC 238      
443-696 4 Dundalk MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-696 5 Dundalk MD   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   829J PAETEC ITEL, LLC 238      
443-696 8 Dundalk MD   876D ONVOY, LLC - MD 238   2021-09-23   
443-696 9 Dundalk MD   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   964H BARR TELL USA, INC. 238   2016-12-17   
443-698 1 Odenton MD   829J PAETEC ITEL, LLC 238   2005-11-11   
443-698 2 Odenton MD   5562 METROPCS, INC. 238   2013-06-14   
443-698 3 Odenton MD   318J COMCAST IP PHONE, LLC 238   2016-08-25   
443-698 4 Odenton MD   5562 METROPCS, INC. 238   2019-12-28   
443-698 5 Odenton MD   876D ONVOY, LLC - MD 238   2024-03-01   
443-698 6 Odenton MD   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   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-02   
443-698 9 Odenton MD   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   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-07   
443-699 1 Annapolis MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-11-13   
443-699 2 Annapolis MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-06-03   
443-699 3 Annapolis MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-06-03   
443-699 4 Annapolis MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-06-03   
443-699 5 Annapolis MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-06-03   
443-699 6 Annapolis MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-07-15   
443-699 7 Annapolis MD   508J CENTURYLINK COMMUNICATIONS, LLC 238   2013-10-01   
443-699 8 Annapolis MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-03-11   
443-699 9 Annapolis MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-03-11   
443-701 A Arbutus MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-701 0 Arbutus MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-701 1 Arbutus MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-701 2 Arbutus MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-701 3 Arbutus MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-01-08   
443-701 4 Arbutus MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-08-26   
443-701 5 Arbutus MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-01-08   
443-701 6 Arbutus MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2023-02-20   
443-701 8 Arbutus MD   939H COMMIO, LLC 238   2021-06-12   
443-701 9 Arbutus MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-10   
443-702 A Armiger-Gibson Island MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-702 0 Armiger-Gibson Island MD   829J PAETEC ITEL, LLC 238      
443-702 1 Armiger-Gibson Island MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2022-07-25   
443-702 2 Armiger-Gibson Island MD   318J COMCAST IP PHONE, LLC 238   2014-10-15   
443-702 3 Armiger-Gibson Island MD   829J PAETEC ITEL, LLC 238      
443-702 4 Armiger-Gibson Island MD   829J PAETEC ITEL, LLC 238   2007-06-15   
443-702 5 Armiger-Gibson Island MD   876D ONVOY, LLC - MD 238   2021-09-23   
443-702 6 Armiger-Gibson Island MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-02-10   
443-702 7 Armiger-Gibson Island MD   318J COMCAST IP PHONE, LLC 238   2008-09-25   
443-702 8 Armiger-Gibson Island MD   876D ONVOY, LLC - MD 238   2021-09-23   
443-702 9 Armiger-Gibson Island MD   515J IP HORIZON LLC 238   2021-08-15   
443-703 A Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-703 0 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-703 1 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-703 2 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-703 3 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-03-10   
443-703 4 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-04-16   
443-703 5 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-04-16   
443-703 6 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-08-13   
443-703 7 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-04-16   
443-703 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-08-13   
443-703 9 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-08-13   
443-704 A Odenton MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-704 0 Odenton MD   829J PAETEC ITEL, LLC 238      
443-704 1 Odenton MD   829J PAETEC ITEL, LLC 238      
443-704 2 Odenton MD   5562 METROPCS, INC. 238   2014-12-26   
443-704 3 Odenton MD   876D ONVOY, LLC - MD 238   2020-06-04   
443-704 4 Odenton MD   5562 METROPCS, INC. 238   2014-12-22   
443-704 5 Odenton MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2025-09-11   
443-704 6 Odenton MD   5562 METROPCS, INC. 238   2015-09-20   
443-704 7 Odenton MD   5562 METROPCS, INC. 238   2019-10-13   
443-704 8 Odenton MD   829J PAETEC ITEL, LLC 238      
443-704 9 Odenton MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2020-08-26   
443-705 A Cockeysville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2024-03-01   
443-705 0 Cockeysville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-09-16   
443-705 1 Cockeysville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-09-16   
443-705 4 Cockeysville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-15   
443-705 5 Cockeysville MD   318J COMCAST IP PHONE, LLC 238   2019-08-22   
443-705 6 Cockeysville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-10-18   
443-705 7 Cockeysville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-10-18   
443-705 8 Cockeysville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-07-19   
443-705 9 Cockeysville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-07-19   
443-706 A Crisfield MD   829J PAETEC ITEL, LLC 242   2025-04-01   
443-706 0 Crisfield MD   145J TERRA NOVA TELECOM INC. 242   2024-02-15   
443-706 1 Crisfield MD   876D ONVOY, LLC - MD 242   2021-04-29   
443-706 2 Crisfield MD   829J PAETEC ITEL, LLC 242      
443-706 3 Crisfield MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 242   2009-03-02   
443-706 4 Crisfield MD   145J TERRA NOVA TELECOM INC. 242   2024-10-12   
443-706 5 Crisfield MD   145J TERRA NOVA TELECOM INC. 242   2025-07-25   
443-706 7 Crisfield MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 242   2016-10-10   
443-706 8 Crisfield MD   876D ONVOY, LLC - MD 242   2017-04-13   
443-706 9 Crisfield MD   876D ONVOY, LLC - MD 242   2021-04-29   
443-707 A Aberdeen MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
443-707 0 Aberdeen MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-11-08   
443-707 1 Aberdeen MD   515J IP HORIZON LLC 236   2014-08-08   
443-707 2 Aberdeen MD   876D ONVOY, LLC - MD 236   2015-07-29   
443-707 3 Aberdeen MD   876D ONVOY, LLC - MD 236   2015-07-29   

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Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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