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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
443-376 2 Dundalk MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
443-376 3 Dundalk MD   829J PAETEC ITEL, LLC 238   2007-06-14   
443-376 4 Dundalk MD   318J COMCAST IP PHONE, LLC 238   2019-05-10   
443-376 5 Dundalk MD   318J COMCAST IP PHONE, LLC 238   2007-08-13   
443-376 6 Dundalk MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-16   
443-376 7 Dundalk MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-28   
443-376 8 Dundalk MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-02   
443-376 9 Dundalk MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-377 A Towson MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-377 0 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-06   
443-377 1 Towson MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-377 2 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-03   
443-377 3 Towson MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-01-02   
443-377 4 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-03   
443-377 5 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-03   
443-377 6 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-03   
443-377 7 Towson MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-03-25   
443-377 8 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-05-02   
443-377 9 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-05-02   
443-378 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2024-02-09   
443-378 0 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-07-25   
443-378 1 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-01-13   
443-378 2 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-01-13   
443-378 3 Baltimore MD   829J PAETEC ITEL, LLC 238   2006-02-10   
443-378 4 Baltimore MD   9212 VERIZON MARYLAND, INC. 238   2006-02-20   
443-378 5 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-09-23   
443-378 6 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-01-13   
443-378 7 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-09-23   
443-378 8 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-09-23   
443-378 9 Baltimore MD   876D ONVOY, LLC - MD 238   2024-02-24   
443-379 A Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-379 0 Pikesville MD   318J COMCAST IP PHONE, LLC 238   2007-04-20   
443-379 1 Pikesville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-08-11   
443-379 2 Pikesville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2007-11-16   
443-379 3 Pikesville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-10-11   
443-379 4 Pikesville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-05-20   
443-379 5 Pikesville MD   829J PAETEC ITEL, LLC 238   2011-01-20   
443-379 6 Pikesville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-23   
443-379 7 Pikesville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-10-11   
443-379 8 Pikesville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-05-20   
443-379 9 Pikesville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-10-11   
443-380 A Woodlawn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-380 0 Woodlawn MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
443-380 1 Woodlawn MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-09-04   
443-380 2 Woodlawn MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-10   
443-380 3 Woodlawn MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-380 4 Woodlawn MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-05   
443-380 5 Woodlawn MD   9212 VERIZON MARYLAND, INC. 238   2011-04-15   
443-380 6 Woodlawn MD   9212 VERIZON MARYLAND, INC. 238   2011-04-15   
443-380 7 Woodlawn MD   9212 VERIZON MARYLAND, INC. 238   2011-04-15   

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

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