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Dundalk, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-282 A DNDLMDDNDS0  9212 VERIZON MARYLAND, INC. 238      
410-284 A DNDLMDDNDS0  9212 VERIZON MARYLAND, INC. 238      
410-285 A DNDLMDDNDS0  9212 VERIZON MARYLAND, INC. 238      
410-288 A DNDLMDDNDS0  9212 VERIZON MARYLAND, INC. 238      
410-650 A BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
410-650 0 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-31   
410-650 1 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-11   
410-650 2 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-650 3 BLTMMDCH08Z  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238   2003-11-08   
410-650 4 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-08   
410-650 5 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2004-11-27   
410-650 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-10   
410-650 7 BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238   2006-06-01   
410-650 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-31   
410-650 9 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-216 A   829J PAETEC ITEL, LLC 238   2025-04-01   
443-216 0   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
443-216 1 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-06-26   
443-216 2   829J PAETEC ITEL, LLC 238   2001-11-02   
443-216 3   829J PAETEC ITEL, LLC 238   2001-11-02   
443-216 4   829J PAETEC ITEL, LLC 238   2001-11-02   
443-216 5   829J PAETEC ITEL, LLC 238   2001-11-02   
443-216 6   829J PAETEC ITEL, LLC 238   2001-11-02   
443-216 7 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-216 8 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-07-13   
443-216 9 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-06-26   
443-376 A BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-376 0 BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-376 1   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-376 2   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
443-376 3   829J PAETEC ITEL, LLC 238   2007-06-14   
443-376 4 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2019-05-10   
443-376 5 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-08-13   
443-376 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-16   
443-376 7 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-28   
443-376 8 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-02   
443-376 9   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-399 A   876D ONVOY, LLC - MD 238      
443-399 0 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-10-21   
443-399 1 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-10-21   
443-399 2 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-08   
443-399 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-23   
443-399 5 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2020-10-28   
443-399 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-23   
443-399 7 BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-04-02   
443-399 8 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2008-03-19   
443-399 9   515J IP HORIZON LLC 238   2013-09-06   
443-407 A BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 0 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 1 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 2 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 3 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-03-24   
443-407 4 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 5 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 6 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 7 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-16   
443-407 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-31   
443-407 9 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-503 A BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-503 0 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-503 1 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-503 2 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-503 3 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-11   
443-503 4 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-20   
443-503 5 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-09-18   
443-503 6 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-09-18   
443-503 7   829J PAETEC ITEL, LLC 238   2009-04-20   
443-503 8 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-02-04   
443-503 9 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-03-17   
443-530 A   829J PAETEC ITEL, LLC 238   2025-04-01   
443-530 0 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-530 1 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-530 2   515J IP HORIZON LLC 238   2016-10-14   
443-530 3 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-02-14   
443-530 4 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-10-01   
443-530 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-01-22   
443-530 6 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2016-04-28   
443-530 7 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-05-28   
443-530 8 BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-25   
443-530 9   829J PAETEC ITEL, LLC 238      
443-549 A   829J PAETEC ITEL, LLC 238   2025-04-01   
443-549 0   829J PAETEC ITEL, LLC 238      
443-549 1   829J PAETEC ITEL, LLC 238      
443-549 2   829J PAETEC ITEL, LLC 238      
443-549 3   829J PAETEC ITEL, LLC 238      
443-549 4 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-05-13   
443-549 5 BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-549 6 BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-549 7 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2024-11-03   
443-549 8   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-549 9   829J PAETEC ITEL, LLC 238      
443-586 A BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-586 0 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-29   
443-586 1 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-29   
443-586 2   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-22   
443-586 3   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-22   
443-586 4   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-22   
443-586 5 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-24   
443-586 6 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-24   
443-586 7 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-29   

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Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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