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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 1 Towson MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-10-14   
443-269 2 Towson MD BLTOMDKHBMD  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 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-11-01   
443-269 7 Towson MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-06-29   
443-269 8 Towson MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2018-09-22   
443-269 9 Towson MD BLTOMDKHBMD  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 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 1 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 2 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 6 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 7 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 8 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-271 9 Baltimore MD BLTMMDCH40Z  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 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-29   
443-272 2 Randallstown MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-08-11   
443-272 3 Randallstown MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-272 4 Randallstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-08   
443-272 5 Randallstown MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-06-26   
443-272 6 Randallstown MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-10-04   
443-272 7 Randallstown MD BLTMMDCHXFX  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 BLTMMDCH40Z  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 CLMAMDNIDS1  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-273 1 Reisterstown MD BLTMMDCH45Z  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 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-09-21   
443-273 4 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-09-28   
443-273 5 Reisterstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-08   
443-273 6 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-11-03   
443-273 7 Reisterstown MD BLTMMDDN2MD  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 CLMAMDNIDS1  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-274 A Severn MD ODTNMDPORS2  9212 VERIZON MARYLAND, INC. 238      
443-274 0 Severn MD BLTMMDSN6MD  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 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-09-20   
443-274 3 Severn MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-274 4 Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-02-29   
443-274 5 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-04-22   
443-274 6 Severn MD   829J PAETEC ITEL, LLC 238   2005-07-04   
443-274 7 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-04-22   
443-274 8 Severn MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2016-04-18   
443-274 9 Severn MD ODTNMDPORS2  9212 VERIZON MARYLAND, INC. 238      
443-275 A Towson MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-275 0 Towson MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2013-01-19   
443-275 1 Towson MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-09-11   
443-275 2 Towson MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-08-13   
443-275 3 Towson MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
443-275 4 Towson MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-275 5 Towson MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2010-11-20   
443-275 6 Towson MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2012-10-27   
443-275 7 Towson MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2012-09-26   
443-275 8 Towson MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-01-29   
443-275 9 Towson MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-13   
443-276 A Columbia MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 0 Columbia MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 1 Columbia MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 2 Columbia MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 3 Columbia MD BLTMMDCH08Z  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238   2003-11-08   
443-276 4 Columbia MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 5 Columbia MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 6 Columbia MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 7 Columbia MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 8 Columbia MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
443-276 9 Columbia MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-277 A Sykesville MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-277 0 Sykesville MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-277 1 Sykesville MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-277 2 Sykesville MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-277 3 Sykesville MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-277 4 Sykesville MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-277 5 Sykesville MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-277 6 Sykesville MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-277 7 Sykesville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-277 8 Sykesville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-277 9 Sykesville MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-278 A Baltimore MD BLTMMDCH08Z  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238      
443-278 0 Baltimore MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-01-06   
443-278 1 Baltimore MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-01-06   
443-278 2 Baltimore MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-01-06   
443-278 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2004-12-03   
443-278 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2004-05-13   
443-278 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2004-05-13   
443-278 6 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2004-05-13   
443-278 7 Baltimore MD   829J PAETEC ITEL, LLC 238   2004-05-15   
443-278 8 Baltimore MD   829J PAETEC ITEL, LLC 238   2005-08-05   
443-278 9 Baltimore MD BLTMMDCH08Z  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238   2003-11-23   
443-279 A Towson MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 0 Towson MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      

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Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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