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Towson, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-938 8 TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
410-938 9   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2025-06-23   
410-967 A CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-269 A BLTQMD01BMD  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-269 0 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-11-01   
443-269 1 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-10-14   
443-269 2 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
443-269 3   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-269 4   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-269 5   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-269 6 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-11-01   
443-269 7 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-06-29   
443-269 8 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2018-09-22   
443-269 9 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-10-14   
443-275 A BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-275 0 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2013-01-19   
443-275 1 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-09-11   
443-275 2 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-08-13   
443-275 3 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
443-275 4 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-275 5 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2010-11-20   
443-275 6 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2012-10-27   
443-275 7 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2012-09-26   
443-275 8 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-01-29   
443-275 9 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-13   
443-279 A BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 0 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 1 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 2 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 3 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 4 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 5 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 6 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 7 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 8 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
443-279 9 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-322 A   829J PAETEC ITEL, LLC 238   2025-04-01   
443-322 0   829J PAETEC ITEL, LLC 238      
443-322 1   829J PAETEC ITEL, LLC 238      
443-322 2   829J PAETEC ITEL, LLC 238      
443-322 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-06-04   
443-322 4 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
443-322 5   829J PAETEC ITEL, LLC 238      
443-322 6 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
443-322 7   829J PAETEC ITEL, LLC 238      
443-322 8   829J PAETEC ITEL, LLC 238      
443-322 9   829J PAETEC ITEL, LLC 238      
443-377 A BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-377 0 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-06   
443-377 1 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   

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Last updated: Sat, 02 May 2026 12:20:53 UTC

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