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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
443-502 9 Havre de Grace MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-503 A Dundalk MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-503 0 Dundalk MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-503 1 Dundalk MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-503 2 Dundalk MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-503 3 Dundalk MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-11   
443-503 4 Dundalk MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-20   
443-503 5 Dundalk MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-09-18   
443-503 6 Dundalk MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-09-18   
443-503 7 Dundalk MD   829J PAETEC ITEL, LLC 238   2009-04-20   
443-503 8 Dundalk MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-02-04   
443-503 9 Dundalk MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-03-17   
443-504 A Fallston MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-504 0 Fallston MD   829J PAETEC ITEL, LLC 238      
443-504 1 Fallston MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
443-504 2 Fallston MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-05-02   
443-504 3 Fallston MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-07-02   
443-504 4 Fallston MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-01-19   
443-504 5 Fallston MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-02-28   
443-504 6 Fallston MD BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-14   
443-504 7 Fallston MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2005-04-01   
443-504 8 Fallston MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-08-02   
443-504 9 Fallston MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-09-29   
443-505 A Essex MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-505 2 Essex MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2011-12-24   
443-505 3 Essex MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-03-20   
443-505 5 Essex MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-01-26   
443-505 6 Essex MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-10-18   
443-505 7 Essex MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-05-16   
443-505 8 Essex MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-09-21   
443-505 9 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2019-10-07   
443-506 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-506 0 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-506 1 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-506 2 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-506 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-506 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-506 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-506 6 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-506 7 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-506 8 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-506 9 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-507 A Hampstead MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-507 0 Hampstead MD HMPSMDHERS1  9212 VERIZON MARYLAND, INC. 238   2003-10-17   
443-507 1 Hampstead MD   829J PAETEC ITEL, LLC 238   2003-07-20   
443-507 3 Hampstead MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
443-507 4 Hampstead MD BLTMMD91DS2  2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2016-01-31   
443-507 5 Hampstead MD HMPSMDHERS1  9212 VERIZON MARYLAND, INC. 238   2005-05-27   
443-507 6 Hampstead MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2009-06-13   
443-507 7 Hampstead MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-507 8 Hampstead MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-02   
443-507 9 Hampstead MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-508 A Hampstead MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-508 0 Hampstead MD   829J PAETEC ITEL, LLC 238      
443-508 1 Hampstead MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2004-12-27   
443-508 2 Hampstead MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-02-17   
443-508 3 Hampstead MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2009-01-05   
443-508 4 Hampstead MD HMPSMDHERS1  9212 VERIZON MARYLAND, INC. 238   2004-10-07   
443-508 5 Hampstead MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-508 6 Hampstead MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-09-12   
443-508 7 Hampstead MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
443-508 8 Hampstead MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-25   
443-508 9 Hampstead MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-509 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-509 0 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-04-11   
443-509 1 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-10-21   
443-509 2 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-19   
443-509 3 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-19   
443-509 4 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-19   
443-509 5 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-19   
443-509 6 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-11-08   
443-509 7 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-10-21   
443-509 8 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-10-21   
443-509 9 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-10-21   
443-510 A Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-510 0 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-02-01   
443-510 1 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-04-04   
443-510 2 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-05-02   
443-510 3 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-06-05   
443-510 4 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-08-01   
443-510 5 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-08-01   
443-510 6 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2008-07-16   
443-510 7 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2008-07-16   
443-510 8 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2008-07-16   
443-510 9 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-08-14   
443-512 A Edgewood MD WNRNMDWNRS1  9212 VERIZON MARYLAND, INC. 238      
443-512 0 Edgewood MD WNRNMDWNRS1  9212 VERIZON MARYLAND, INC. 238      
443-512 1 Edgewood MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2020-07-10   
443-512 2 Edgewood MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-05   
443-512 3 Edgewood MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-512 4 Edgewood MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2017-01-19   
443-512 5 Edgewood MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2017-01-19   
443-512 6 Edgewood MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2018-07-05   
443-512 7 Edgewood MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2018-10-14   
443-512 8 Edgewood MD WNRNMDWNRS1  9212 VERIZON MARYLAND, INC. 238      
443-512 9 Edgewood MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-513 A Berlin MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-513 0 Berlin MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-513 1 Berlin MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-513 2 Berlin MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2020-08-09   

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Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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