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Parkville, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-870 A BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
410-870 0   318J COMCAST IP PHONE, LLC 238   2005-04-16   
410-870 1   318J COMCAST IP PHONE, LLC 238   2006-06-19   
410-870 2   318J COMCAST IP PHONE, LLC 238   2006-06-19   
410-870 3   318J COMCAST IP PHONE, LLC 238   2009-03-27   
410-870 4   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-09-18   
410-870 5   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-10-14   
410-870 6   318J COMCAST IP PHONE, LLC 238   2009-03-27   
410-870 7   071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-04-29   
410-870 8   071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-06-11   
410-870 9   071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-10-12   
410-882 A PKVLMDPKDS0  9212 VERIZON MARYLAND, INC. 238      
410-931 A WHMRMDWMRS2  9212 VERIZON MARYLAND, INC. 238      
410-933 A WHMRMDWMRS2  9212 VERIZON MARYLAND, INC. 238      
443-219 A BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-219 0   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-219 1   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-219 2   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-01-13   
443-219 3   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-10   
443-219 4   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-20   
443-219 5   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2012-03-10   
443-219 6   071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-10-12   
443-219 7   071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-04-22   
443-219 8   071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-04-22   
443-219 9   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-290 A BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-290 0   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-290 1   515J IP HORIZON LLC 238   2013-09-06   
443-290 2   7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-290 3   876D ONVOY, LLC - MD 238   2016-03-29   
443-290 4   318J COMCAST IP PHONE, LLC 238   2014-01-06   
443-290 5   876D ONVOY, LLC - MD 238   2012-10-07   
443-290 6   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-290 7   071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-08-15   
443-290 8   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-290 9   071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-08-15   
443-384 A   829J PAETEC ITEL, LLC 238   2025-04-01   
443-384 0   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-384 1   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-384 2   829J PAETEC ITEL, LLC 238   2001-11-01   
443-384 3   829J PAETEC ITEL, LLC 238   2001-11-01   
443-384 4   829J PAETEC ITEL, LLC 238   2001-11-01   
443-384 5   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2020-11-14   
443-384 6   829J PAETEC ITEL, LLC 238   2001-11-01   
443-384 7   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-384 8   508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-04-02   
443-384 9   829J PAETEC ITEL, LLC 238      
443-425 A BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-425 0   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-05-21   
443-425 1   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      

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

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