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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
443-671 9 New Windsor MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-672 A Parkton MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-672 0 Parkton MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-672 1 Parkton MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2004-01-31   
443-672 2 Parkton MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-02-25   
443-672 3 Parkton MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-672 4 Parkton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2019-02-19   
443-672 5 Parkton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2019-02-19   
443-672 6 Parkton MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-672 7 Parkton MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-672 8 Parkton MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-10-12   
443-672 9 Parkton MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-673 A Brooklyn Park-Linthicum MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-673 0 Brooklyn Park-Linthicum MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-673 1 Brooklyn Park-Linthicum MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-22   
443-673 2 Brooklyn Park-Linthicum MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-02-28   
443-673 3 Brooklyn Park-Linthicum MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-673 4 Brooklyn Park-Linthicum MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-02-25   
443-673 5 Brooklyn Park-Linthicum MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-09-23   
443-673 6 Brooklyn Park-Linthicum MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-673 7 Brooklyn Park-Linthicum MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-04-30   
443-673 8 Brooklyn Park-Linthicum MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2023-02-23   
443-673 9 Brooklyn Park-Linthicum MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-11-30   
443-674 A North East MD BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-674 0 North East MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-26   
443-674 1 North East MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2004-02-05   
443-674 2 North East MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-10-18   
443-674 3 North East MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2019-01-22   
443-674 4 North East MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-674 5 North East MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-674 6 North East MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2017-04-04   
443-674 7 North East MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2017-08-13   
443-674 8 North East MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-07-25   
443-674 9 North East MD BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-675 A Randallstown MD PIVLMDPKXHX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-675 0 Randallstown MD PIVLMDPKXHX  829J PAETEC ITEL, LLC 238      
443-675 1 Randallstown MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2020-06-11   
443-675 2 Randallstown MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-09-19   
443-675 3 Randallstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2025-10-30   
443-675 4 Randallstown MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
443-675 5 Randallstown MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-675 6 Randallstown MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-02   
443-675 7 Randallstown MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-02   
443-675 8 Randallstown MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-04   
443-675 9 Randallstown MD PIVLMDPKXHX  829J PAETEC ITEL, LLC 238      
443-676 A Baltimore MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-677 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-677 0 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-677 1 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-677 2 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      

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

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