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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
443-544 5 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-03-10   
443-544 6 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-544 7 Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-04-10   
443-544 8 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-544 9 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-545 A Columbia MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-545 0 Columbia MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-09-25   
443-545 1 Columbia MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-545 2 Columbia MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-545 3 Columbia MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-545 4 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-04-04   
443-545 5 Columbia MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-06-03   
443-545 6 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-08-01   
443-545 7 Columbia MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-03   
443-545 8 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-09-19   
443-545 9 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-10-03   
443-546 A Columbia MD CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
443-546 0 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-03   
443-546 1 Columbia MD CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
443-546 2 Columbia MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2007-08-24   
443-546 3 Columbia MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-09-15   
443-546 4 Columbia MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-09-15   
443-546 5 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-07-11   
443-546 6 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-22   
443-546 7 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-01   
443-546 8 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-10-10   
443-546 9 Columbia MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-04-24   
443-547 A Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-547 0 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-07-06   
443-547 1 Westminster MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2009-09-09   
443-547 2 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-10-02   
443-547 3 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-01-16   
443-547 4 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-05-03   
443-547 5 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-15   
443-547 6 Westminster MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-02-26   
443-547 7 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-03-13   
443-547 8 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-05-02   
443-547 9 Westminster MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2010-07-19   
443-548 A Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-548 0 Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-548 1 Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-548 2 Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-548 3 Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-11-07   
443-548 4 Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-548 5 Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-548 6 Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-548 7 Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-548 8 Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-548 9 Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-549 A Dundalk MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-549 0 Dundalk MD   829J PAETEC ITEL, LLC 238      
443-549 1 Dundalk MD   829J PAETEC ITEL, LLC 238      
443-549 2 Dundalk MD   829J PAETEC ITEL, LLC 238      
443-549 3 Dundalk MD   829J PAETEC ITEL, LLC 238      
443-549 4 Dundalk MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-05-13   
443-549 5 Dundalk MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-549 6 Dundalk MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-549 7 Dundalk MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2024-11-03   
443-549 8 Dundalk MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-549 9 Dundalk MD   829J PAETEC ITEL, LLC 238      
443-550 A North Beach MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-550 0 North Beach MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2025-01-19   
443-550 1 North Beach MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-10-14   
443-550 2 North Beach MD   829J PAETEC ITEL, LLC 238   2004-02-05   
443-550 3 North Beach MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-550 4 North Beach MD BLTMMD91DS2  2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-25   
443-550 5 North Beach MD   829J PAETEC ITEL, LLC 238   2008-01-03   
443-550 6 North Beach MD NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238   2004-10-01   
443-550 7 North Beach MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
443-550 8 North Beach MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2004-02-07   
443-550 9 North Beach MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-07-15   
443-551 A Woodlawn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-551 0 Woodlawn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-05-11   
443-551 1 Woodlawn MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-551 2 Woodlawn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-07-05   
443-551 3 Woodlawn MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-05-12   
443-551 4 Woodlawn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-551 5 Woodlawn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-08-11   
443-551 6 Woodlawn MD   876D ONVOY, LLC - MD 238   2025-02-01   
443-551 7 Woodlawn MD   876D ONVOY, LLC - MD 238   2025-02-01   
443-551 8 Woodlawn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-10-21   
443-551 9 Woodlawn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-10-21   
443-552 A Baltimore MD BLTMMDMDDS0  9212 VERIZON MARYLAND, INC. 238      
443-552 0 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-05-16   
443-552 1 Baltimore MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2016-01-05   
443-552 2 Baltimore MD BLTMMDMDDS0  9212 VERIZON MARYLAND, INC. 238      
443-552 3 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-05-16   
443-552 4 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-05-16   
443-552 5 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-05-16   
443-552 6 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-04-20   
443-552 7 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-05-16   
443-552 8 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-04-20   
443-552 9 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-09-22   
443-553 A Elkton MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-554 A Chase MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-554 0 Chase MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-554 1 Chase MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-12-13   
443-554 2 Chase MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-12-13   
443-554 3 Chase MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-10-09   
443-554 4 Chase MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-12-24   

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

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