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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
443-734 5 Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2015-03-13   
443-734 6 Severn MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-11-11   
443-734 7 Severn MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-05-29   
443-734 8 Severn MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-05-29   
443-734 9 Severn MD ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
443-735 A Salisbury MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-736 A Salisbury MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-736 0 Salisbury MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-736 1 Salisbury MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2013-07-21   
443-736 2 Salisbury MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2011-04-16   
443-736 3 Salisbury MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2008-03-26   
443-736 4 Salisbury MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2008-03-26   
443-736 5 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2011-10-11   
443-736 6 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2010-05-03   
443-736 7 Salisbury MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2007-10-29   
443-736 8 Salisbury MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2007-10-29   
443-736 9 Salisbury MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-737 A Waterloo MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-737 0 Waterloo MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-737 1 Waterloo MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-737 2 Waterloo MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-07-16   
443-737 3 Waterloo MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
443-737 4 Waterloo MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2004-02-07   
443-737 5 Waterloo MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
443-737 6 Waterloo MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-21   
443-737 7 Waterloo MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-21   
443-737 8 Waterloo MD   515J IP HORIZON LLC 238   2015-03-21   
443-737 9 Waterloo MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-738 A Pikesville MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-738 0 Pikesville MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-738 1 Pikesville MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-738 2 Pikesville MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-738 3 Pikesville MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-738 4 Pikesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-09-01   
443-738 5 Pikesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-09-01   
443-738 6 Pikesville MD BLTMMDCHDMD  551G NUSO, LLC 238   2016-08-31   
443-738 7 Pikesville MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-738 8 Pikesville MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-738 9 Pikesville MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-739 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-740 A Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-740 0 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-03-28   
443-740 1 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-03-28   
443-740 2 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-03-20   
443-740 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-03-28   
443-740 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-03-28   
443-740 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-03-28   
443-740 6 Baltimore MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-12-31   
443-740 7 Baltimore MD BLTQMD019MD  490J BOOST SUBSCRIBERCO L.L.C. 238   2024-07-20   
443-740 8 Baltimore MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2024-10-23   
443-740 9 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-03   
443-741 A Columbia MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-741 0 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-08-08   
443-741 1 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-05-20   
443-741 2 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-20   
443-741 3 Columbia MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-05-13   
443-741 4 Columbia MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2012-05-05   
443-741 5 Columbia MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2013-06-14   
443-741 6 Columbia MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2013-06-14   
443-741 7 Columbia MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-08-01   
443-741 8 Columbia MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-741 9 Columbia MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-742 A Baltimore MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-743 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-743 0 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-05-29   
443-743 1 Baltimore MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2008-07-09   
443-743 2 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-07-18   
443-743 3 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-07-18   
443-743 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-08-18   
443-743 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-08-18   
443-743 6 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-08-18   
443-743 7 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-08-18   
443-743 8 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-08-18   
443-743 9 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-07-03   
443-744 A Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2024-02-09   
443-744 0 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-744 1 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-744 2 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-744 3 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-744 4 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-744 5 Reisterstown MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-744 6 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-744 7 Reisterstown MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-744 8 Reisterstown MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2017-01-20   
443-744 9 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-745 A Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-746 A Easton MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242      
443-746 0 Easton MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2010-02-20   
443-746 1 Easton MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2021-09-21   
443-746 2 Easton MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2014-10-23   
443-746 3 Easton MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242      
443-746 4 Easton MD ESTNMDES5MD  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 242   2015-09-01   
443-746 5 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-746 6 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-746 7 Easton MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2020-04-30   
443-746 8 Easton MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2020-04-30   
443-746 9 Easton MD SLBRMDSBXMD  073H TELNYX LLC 242   2022-08-01   
443-747 A Port Deposit MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-747 0 Port Deposit MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-747 1 Port Deposit MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-18   

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Last updated: Sun, 01 Nov 2026 02:11:49 UTC

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