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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
443-669 5 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-02-26   
443-669 6 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-10-03   
443-669 7 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-06-05   
443-669 8 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-06-05   
443-669 9 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-10-03   
443-670 A Catonsville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-670 0 Catonsville MD   829J PAETEC ITEL, LLC 238      
443-670 1 Catonsville MD   829J PAETEC ITEL, LLC 238      
443-670 2 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-670 3 Catonsville MD   829J PAETEC ITEL, LLC 238      
443-670 4 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-670 5 Catonsville MD   829J PAETEC ITEL, LLC 238      
443-670 6 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-670 7 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-670 8 Catonsville MD   829J PAETEC ITEL, LLC 238      
443-670 9 Catonsville MD   829J PAETEC ITEL, LLC 238      
443-671 A New Windsor MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-671 0 New Windsor MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
443-671 1 New Windsor MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-05   
443-671 2 New Windsor MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-09-02   
443-671 4 New Windsor MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-31   
443-671 5 New Windsor MD   829J PAETEC ITEL, LLC 238   2006-04-07   
443-671 6 New Windsor MD   318J COMCAST IP PHONE, LLC 238   2007-01-19   
443-671 7 New Windsor MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-18   
443-671 8 New Windsor MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-31   
443-671 9 New Windsor MD   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   829J PAETEC ITEL, LLC 238   2004-01-31   
443-672 2 Parkton MD   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   876D ONVOY, LLC - MD 238   2019-02-19   
443-672 5 Parkton MD   876D ONVOY, LLC - MD 238   2019-02-19   
443-672 6 Parkton MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-672 7 Parkton MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-672 8 Parkton MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-10-12   
443-672 9 Parkton MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-673 A Brooklyn Park-Linthicum MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-673 0 Brooklyn Park-Linthicum MD   829J PAETEC ITEL, LLC 238      
443-673 1 Brooklyn Park-Linthicum MD   624H ONVOY SPECTRUM, LLC 238   2021-05-22   
443-673 2 Brooklyn Park-Linthicum MD   5562 METROPCS, INC. 238   2014-02-28   
443-673 3 Brooklyn Park-Linthicum MD   829J PAETEC ITEL, LLC 238      
443-673 4 Brooklyn Park-Linthicum MD   5562 METROPCS, INC. 238   2014-02-25   
443-673 5 Brooklyn Park-Linthicum MD   876D ONVOY, LLC - MD 238   2021-09-23   
443-673 6 Brooklyn Park-Linthicum MD   829J PAETEC ITEL, LLC 238      
443-673 7 Brooklyn Park-Linthicum MD   5562 METROPCS, INC. 238   2014-04-30   
443-673 8 Brooklyn Park-Linthicum MD   5562 METROPCS, INC. 238   2023-02-23   
443-673 9 Brooklyn Park-Linthicum MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-11-30   
443-674 A North East MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-674 0 North East MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-26   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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