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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
443-269 0 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-11-01   
443-269 1 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-10-14   
443-269 2 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
443-269 3 Towson MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-269 4 Towson MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-269 5 Towson MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-269 6 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-11-01   
443-269 7 Towson MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-06-29   
443-269 8 Towson MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2018-09-22   
443-269 9 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-10-14   
443-270 A Glen Burnie MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-271 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 0 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 1 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 2 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 3 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 4 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 5 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 6 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 7 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 9 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-272 A Randallstown MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-272 0 Randallstown MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-272 1 Randallstown MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-29   
443-272 2 Randallstown MD   318J COMCAST IP PHONE, LLC 238   2014-08-11   
443-272 3 Randallstown MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-272 4 Randallstown MD   876D ONVOY, LLC - MD 238   2012-10-08   
443-272 5 Randallstown MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-06-26   
443-272 6 Randallstown MD   318J COMCAST IP PHONE, LLC 238   2013-10-04   
443-272 7 Randallstown MD   318J COMCAST IP PHONE, LLC 238   2008-04-08   
443-272 8 Randallstown MD   515J IP HORIZON LLC 238   2015-03-23   
443-272 9 Randallstown MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2019-04-19   
443-273 A Reisterstown MD CLMAMDNIDS1  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-273 0 Reisterstown MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-273 1 Reisterstown MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-02   
443-273 2 Reisterstown MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-22   
443-273 3 Reisterstown MD   318J COMCAST IP PHONE, LLC 238   2014-09-21   
443-273 4 Reisterstown MD   5562 METROPCS, INC. 238   2014-09-28   
443-273 5 Reisterstown MD   876D ONVOY, LLC - MD 238   2012-10-08   
443-273 6 Reisterstown MD   5562 METROPCS, INC. 238   2014-11-03   
443-273 7 Reisterstown MD   508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-273 8 Reisterstown MD   515J IP HORIZON LLC 238   2016-01-04   
443-273 9 Reisterstown MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-274 A Severn MD ODTNMDPORS2  9212 VERIZON MARYLAND, INC. 238      
443-274 0 Severn MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-27   
443-274 1 Severn MD   829J PAETEC ITEL, LLC 238   2005-10-17   
443-274 2 Severn MD   318J COMCAST IP PHONE, LLC 238   2007-09-20   
443-274 3 Severn MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-274 4 Severn MD   876D ONVOY, LLC - MD 238   2012-02-29   

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

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