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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
443-957 5 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-09-22   
443-957 6 Baltimore MD   7421 AT&T - LOCAL 238      
443-957 7 Baltimore MD   145J TERRA NOVA TELECOM INC. 238   2024-05-25   
443-957 8 Baltimore MD   145J TERRA NOVA TELECOM INC. 238   2024-12-29   
443-957 9 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-03   
443-960 A Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-960 0 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-12-08   
443-960 1 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2016-02-06   
443-960 2 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2016-02-06   
443-960 3 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2016-04-11   
443-960 4 Glen Burnie MD   318J COMCAST IP PHONE, LLC 238   2016-04-18   
443-960 5 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2016-02-05   
443-960 6 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-06-03   
443-960 7 Glen Burnie MD   876D ONVOY, LLC - MD 238   2014-12-31   
443-960 8 Glen Burnie MD   876D ONVOY, LLC - MD 238   2014-12-31   
443-960 9 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2016-04-12   
443-961 A Baltimore MD BLTMMDCHPMD  820C INTRADO COMMUNICATIONS, LLC 238      
443-961 0 Baltimore MD   820C INTRADO COMMUNICATIONS, LLC 238   2015-02-13   
443-961 1 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-961 2 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-961 3 Baltimore MD   318J COMCAST IP PHONE, LLC 238   2015-03-20   
443-961 4 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-961 5 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-961 6 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-961 7 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-961 8 Baltimore MD   318J COMCAST IP PHONE, LLC 238   2015-07-02   
443-961 9 Baltimore MD   820C INTRADO COMMUNICATIONS, LLC 238   2015-02-13   
443-962 A Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-962 0 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-11-05   
443-962 1 Glen Burnie MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2007-11-20   
443-962 2 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-12-14   
443-962 3 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-01-14   
443-962 4 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-04   
443-962 5 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-04   
443-962 6 Glen Burnie MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-13   
443-962 7 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-03-03   
443-962 8 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-04-21   
443-962 9 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-04-21   
443-963 A Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-963 0 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-12-31   
443-963 1 Baltimore MD   318J COMCAST IP PHONE, LLC 238   2015-12-26   
443-963 2 Baltimore MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2012-03-25   
443-963 3 Baltimore MD   876D ONVOY, LLC - MD 238   2012-05-19   
443-963 4 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-24   
443-963 5 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-24   
443-963 6 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-24   
443-963 7 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-24   
443-963 8 Baltimore MD   145J TERRA NOVA TELECOM INC. 238   2022-08-02   
443-963 9 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-07-15   
443-964 A North Beach MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      

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

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