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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
443-377 3 Towson MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-01-02   
443-377 4 Towson MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-03   
443-377 5 Towson MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-03   
443-377 6 Towson MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-03   
443-377 7 Towson MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-03-25   
443-377 8 Towson MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-05-02   
443-377 9 Towson MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-05-02   
443-378 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2024-02-09   
443-378 0 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-07-25   
443-378 1 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-01-13   
443-378 2 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-01-13   
443-378 3 Baltimore MD   829J PAETEC ITEL, LLC 238   2006-02-10   
443-378 4 Baltimore MD BLTMMDCHDS2  9212 VERIZON MARYLAND, INC. 238   2006-02-20   
443-378 5 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-09-23   
443-378 6 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-01-13   
443-378 7 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-09-23   
443-378 8 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-09-23   
443-378 9 Baltimore MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-24   
443-379 A Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-379 0 Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-04-20   
443-379 1 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-08-11   
443-379 2 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2007-11-16   
443-379 3 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-10-11   
443-379 4 Pikesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-05-20   
443-379 5 Pikesville MD   829J PAETEC ITEL, LLC 238   2011-01-20   
443-379 6 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-23   
443-379 7 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-10-11   
443-379 8 Pikesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-05-20   
443-379 9 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-10-11   
443-380 A Woodlawn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-380 0 Woodlawn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
443-380 1 Woodlawn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-09-04   
443-380 2 Woodlawn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-10   
443-380 3 Woodlawn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-380 4 Woodlawn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-05   
443-380 5 Woodlawn MD WDLWMDWLDS0  9212 VERIZON MARYLAND, INC. 238   2011-04-15   
443-380 6 Woodlawn MD WDLWMDWLDS0  9212 VERIZON MARYLAND, INC. 238   2011-04-15   
443-380 7 Woodlawn MD WDLWMDWLDS0  9212 VERIZON MARYLAND, INC. 238   2011-04-15   
443-380 8 Woodlawn MD WDLWMDWLDS0  9212 VERIZON MARYLAND, INC. 238   2011-04-15   
443-380 9 Woodlawn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-05-01   
443-381 A Reisterstown MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-381 0 Reisterstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-09-23   
443-381 1 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2019-10-13   
443-381 2 Reisterstown MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-01-01   
443-381 3 Reisterstown MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-24   
443-381 4 Reisterstown MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-24   
443-381 5 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2018-03-16   
443-381 6 Reisterstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-03-09   
443-381 7 Reisterstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-05-03   
443-381 8 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2018-02-08   
443-381 9 Reisterstown MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-04-05   
443-382 A Cambridge MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC.- MD 242      
443-383 A Silver Run MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-383 0 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-08   
443-383 1 Silver Run MD   829J PAETEC ITEL, LLC 238      
443-383 2 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-08   
443-383 3 Silver Run MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-25   
443-383 4 Silver Run MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-25   
443-383 5 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-08   
443-383 6 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-08   
443-383 7 Silver Run MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-383 8 Silver Run MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
443-383 9 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-08   
443-384 A Parkville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-384 0 Parkville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-384 1 Parkville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-384 2 Parkville MD   829J PAETEC ITEL, LLC 238   2001-11-01   
443-384 3 Parkville MD   829J PAETEC ITEL, LLC 238   2001-11-01   
443-384 4 Parkville MD   829J PAETEC ITEL, LLC 238   2001-11-01   
443-384 5 Parkville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2020-11-14   
443-384 6 Parkville MD   829J PAETEC ITEL, LLC 238   2001-11-01   
443-384 7 Parkville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-384 8 Parkville MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-04-02   
443-384 9 Parkville MD   829J PAETEC ITEL, LLC 238      
443-385 A Easton MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC.- MD 242      
443-386 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-386 0 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-386 1 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-386 2 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-386 3 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-386 4 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-386 5 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-386 6 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-386 7 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-386 8 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2003-07-18   
443-386 9 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2003-11-03   
443-387 A Pocomoke MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC.- MD 242      
443-388 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-388 0 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-06-08   
443-388 1 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-03   
443-388 2 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-03   
443-388 3 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-03   
443-388 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-07-24   
443-388 5 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-12-31   
443-388 6 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-08-07   
443-388 7 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-08-07   
443-388 8 Baltimore MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-07-07   
443-388 9 Baltimore MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-07-07   
443-389 A Salisbury MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC.- MD 242      
443-390 A Churchville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238      

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

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