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Columbia, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
443-542 5   829J PAETEC ITEL, LLC 238   2004-06-25   
443-542 6   9212 VERIZON MARYLAND, INC. 238   2004-12-20   
443-542 7   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-02-02   
443-542 8   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-09-01   
443-542 9   318J COMCAST IP PHONE, LLC 238   2007-01-19   
443-545 A BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-545 0   876D ONVOY, LLC - MD 238   2021-09-25   
443-545 1   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-545 2   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-545 3   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-545 4   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-04-04   
443-545 5   318J COMCAST IP PHONE, LLC 238   2006-06-03   
443-545 6   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-08-01   
443-545 7   876D ONVOY, LLC - MD 238   2016-03-03   
443-545 8   071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-09-19   
443-545 9   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-10-03   
443-546 A CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
443-546 0   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-03   
443-546 1   9212 VERIZON MARYLAND, INC. 238      
443-546 2   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2007-08-24   
443-546 3   318J COMCAST IP PHONE, LLC 238   2006-09-15   
443-546 4   318J COMCAST IP PHONE, LLC 238   2006-09-15   
443-546 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-07-11   
443-546 6   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-22   
443-546 7   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-01   
443-546 8   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-10-10   
443-546 9   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-04-24   
443-583 A   829J PAETEC ITEL, LLC 238   2025-04-01   
443-583 0   876D ONVOY, LLC - MD 238   2016-03-03   
443-583 1   829J PAETEC ITEL, LLC 238      
443-583 2   2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2016-01-31   
443-583 3   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-583 4   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-583 5   876D ONVOY, LLC - MD 238   2014-09-01   
443-583 6   5562 METROPCS, INC. 238   2015-05-29   
443-583 7   318J COMCAST IP PHONE, LLC 238   2014-09-16   
443-583 8   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-583 9   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-11-08   
443-656 A   829J PAETEC ITEL, LLC 238   2025-04-01   
443-656 0   829J PAETEC ITEL, LLC 238      
443-656 1   624H ONVOY SPECTRUM, LLC 238   2021-05-22   
443-656 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-01-08   
443-656 3   829J PAETEC ITEL, LLC 238      
443-656 4   829J PAETEC ITEL, LLC 238      
443-656 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-01-08   
443-656 6   829J PAETEC ITEL, LLC 238      
443-656 7   829J PAETEC ITEL, LLC 238      
443-656 8   829J PAETEC ITEL, LLC 238      
443-656 9   876D ONVOY, LLC - MD 238   2021-07-11   
443-718 A   829J PAETEC ITEL, LLC 238   2025-04-01   
443-718 0   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-19   
443-718 1   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-07-12   
443-718 2   829J PAETEC ITEL, LLC 238   2008-05-10   
443-718 3   829J PAETEC ITEL, LLC 238   2008-05-10   
443-718 4   829J PAETEC ITEL, LLC 238   2008-06-16   
443-718 5   829J PAETEC ITEL, LLC 238   2008-06-16   
443-718 6   829J PAETEC ITEL, LLC 238   2008-09-25   
443-718 7   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-07-12   
443-718 8   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-04-02   
443-718 9   071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-741 A BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-741 0   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-08-08   
443-741 1   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-05-20   
443-741 2   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-20   
443-741 3   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-05-13   
443-741 4   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2012-05-05   
443-741 5   5562 METROPCS, INC. 238   2013-06-14   
443-741 6   5562 METROPCS, INC. 238   2013-06-14   
443-741 7   5562 METROPCS, INC. 238   2014-08-01   
443-741 8   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-741 9   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-745 A BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-766 A   829J PAETEC ITEL, LLC 238   2025-04-01   
443-766 0   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-12-14   
443-766 1   829J PAETEC ITEL, LLC 238   2005-07-09   
443-766 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2016-08-03   
443-766 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2016-08-03   
443-766 4   5562 METROPCS, INC. 238   2015-10-01   
443-766 5   5562 METROPCS, INC. 238   2015-09-03   
443-766 6   5562 METROPCS, INC. 238   2015-11-03   
443-766 7   829J PAETEC ITEL, LLC 238   2006-07-15   
443-766 8   5562 METROPCS, INC. 238   2015-10-30   
443-766 9   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-01-14   
443-774 A CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-774 0   071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-04-27   
443-774 1   071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-04-27   
443-774 2   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
443-774 3   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
443-774 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-10-07   
443-774 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-07-20   
443-774 6   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
443-774 7   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
443-774 8   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-04-19   
443-774 9   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-01-19   
443-812 A BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-812 0   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-812 1   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-812 2   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-812 3   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-812 4   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      

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Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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