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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
443-209 0 Havre de Grace MD   829J PAETEC ITEL, LLC 238      
443-209 1 Havre de Grace MD   829J PAETEC ITEL, LLC 238      
443-209 3 Havre de Grace MD   829J PAETEC ITEL, LLC 238      
443-209 4 Havre de Grace MD   829J PAETEC ITEL, LLC 238      
443-209 5 Havre de Grace MD   829J PAETEC ITEL, LLC 238   2005-10-07   
443-209 6 Havre de Grace MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2020-10-16   
443-209 7 Havre de Grace MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2009-03-02   
443-209 8 Havre de Grace MD   829J PAETEC ITEL, LLC 238      
443-209 9 Havre de Grace MD   829J PAETEC ITEL, LLC 238      
443-210 A Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-210 0 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2015-06-21   
443-210 1 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2015-06-21   
443-210 2 Salisbury MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2013-03-07   
443-210 3 Salisbury MD ESTNMDES5MD  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 242   2011-11-18   
443-210 4 Salisbury MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2014-10-23   
443-210 5 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2016-10-01   
443-210 6 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2016-11-23   
443-210 7 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2011-11-14   
443-210 8 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2011-11-14   
443-210 9 Salisbury MD   145J TERRA NOVA TELECOM INC. 242   2023-11-16   
443-212 A Sparks-Glencoe MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-212 1 Sparks-Glencoe MD   829J PAETEC ITEL, LLC 238   2003-03-29   
443-212 3 Sparks-Glencoe MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
443-212 4 Sparks-Glencoe MD   829J PAETEC ITEL, LLC 238   2004-09-28   
443-212 5 Sparks-Glencoe MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-212 6 Sparks-Glencoe MD   145J TERRA NOVA TELECOM INC. 238   2025-04-09   
443-212 7 Sparks-Glencoe MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-07-01   
443-212 8 Sparks-Glencoe MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
443-212 9 Sparks-Glencoe MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-05-21   
443-213 A Pikesville MD OWMLMDOMDS0  9212 VERIZON MARYLAND, INC. 238      
443-213 0 Pikesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-09-07   
443-213 1 Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2006-09-11   
443-213 2 Pikesville MD OWMLMDOMDS0  9212 VERIZON MARYLAND, INC. 238   2003-09-26   
443-213 3 Pikesville MD OWMLMDOMDS0  9212 VERIZON MARYLAND, INC. 238   2003-09-26   
443-213 4 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-03-17   
443-213 5 Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-07-13   
443-213 6 Pikesville MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2003-09-26   
443-213 7 Pikesville MD   829J PAETEC ITEL, LLC 238   2016-12-07   
443-213 8 Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2011-06-28   
443-213 9 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-03-17   
443-214 A Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-214 0 Annapolis MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-02-22   
443-214 1 Annapolis MD   515J IP HORIZON LLC 238   2013-09-06   
443-214 2 Annapolis MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-03-16   
443-214 3 Annapolis MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2013-08-10   
443-214 4 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2013-07-16   
443-214 5 Annapolis MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-09-30   
443-214 6 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2013-10-11   
443-214 7 Annapolis MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-12-17   
443-214 8 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-23   
443-214 9 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-23   
443-215 A Chestertown MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC.- MD 242      
443-216 A Dundalk MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-216 0 Dundalk MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
443-216 1 Dundalk MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-06-26   
443-216 2 Dundalk MD   829J PAETEC ITEL, LLC 238   2001-11-02   
443-216 3 Dundalk MD   829J PAETEC ITEL, LLC 238   2001-11-02   
443-216 4 Dundalk MD   829J PAETEC ITEL, LLC 238   2001-11-02   
443-216 5 Dundalk MD   829J PAETEC ITEL, LLC 238   2001-11-02   
443-216 6 Dundalk MD   829J PAETEC ITEL, LLC 238   2001-11-02   
443-216 7 Dundalk MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-216 8 Dundalk MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-07-13   
443-216 9 Dundalk MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-06-26   
443-217 A Annapolis MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-218 A Worthington MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-218 0 Worthington MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-11-11   
443-218 2 Worthington MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-05   
443-218 3 Worthington MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-09-04   
443-218 5 Worthington MD BLTMMDCHX7X  073H TELNYX LLC 238   2023-08-12   
443-218 6 Worthington MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-218 7 Worthington MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2011-11-20   
443-218 8 Worthington MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2006-08-07   
443-218 9 Worthington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-04-30   
443-219 A Parkville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-219 0 Parkville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-219 1 Parkville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-219 2 Parkville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-01-13   
443-219 3 Parkville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-10   
443-219 4 Parkville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-20   
443-219 5 Parkville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2012-03-10   
443-219 6 Parkville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-10-12   
443-219 7 Parkville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-04-22   
443-219 8 Parkville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-04-22   
443-219 9 Parkville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-220 A Baltimore MD BLTMMDCHDS2  9212 VERIZON MARYLAND, INC. 238      
443-220 0 Baltimore MD BLTMMDCHDS2  9212 VERIZON MARYLAND, INC. 238      
443-220 1 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2004-01-12   
443-220 2 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-08-13   
443-220 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-08-13   
443-220 4 Baltimore MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2003-08-17   
443-220 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2003-08-17   
443-220 6 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2003-08-17   
443-220 7 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2004-01-12   
443-220 8 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2004-01-12   
443-220 9 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2004-01-12   
443-221 A Annapolis MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-221 0 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-12   
443-221 1 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-12   
443-221 2 Annapolis MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2010-08-01   
443-221 3 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-12   

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

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