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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
443-855 3 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 4 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 5 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 6 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 7 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 8 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 9 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-856 A Ocean City MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC.- MD 242      
443-856 0 Ocean City MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2016-07-06   
443-856 1 Ocean City MD ESTNMDBNGT0  2593 CORE COMMUNICATIONS, INC.- MD 242   2002-08-23   
443-856 2 Ocean City MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2008-07-29   
443-856 3 Ocean City MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2016-07-06   
443-856 4 Ocean City MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2005-02-17   
443-856 5 Ocean City MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2007-07-27   
443-856 6 Ocean City MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2013-03-17   
443-856 7 Ocean City MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2012-08-17   
443-856 8 Ocean City MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2004-01-18   
443-856 9 Ocean City MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2004-01-18   
443-857 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-858 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-859 A Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-859 0 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-859 1 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-12-14   
443-859 2 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-12-14   
443-859 3 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-03-03   
443-859 4 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-03-03   
443-859 5 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-08-14   
443-859 6 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2011-07-21   
443-859 7 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-08-02   
443-859 8 Salisbury MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2007-08-13   
443-859 9 Salisbury MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-02   
443-860 A Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-860 0 Catonsville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-17   
443-860 1 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-18   
443-860 2 Catonsville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-17   
443-860 3 Catonsville MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-860 4 Catonsville MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2010-12-29   
443-860 5 Catonsville MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-01-18   
443-860 6 Catonsville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-17   
443-860 7 Catonsville MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-11-04   
443-860 8 Catonsville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-860 9 Catonsville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-12-14   
443-861 A Aberdeen MD ABRDMDABDS0  9212 VERIZON MARYLAND, INC. 236      
443-861 0 Aberdeen MD ABRDMDABDS0  9212 VERIZON MARYLAND, INC. 236   2009-10-11   
443-861 1 Aberdeen MD ABRDMDABDS0  9212 VERIZON MARYLAND, INC. 236   2009-10-11   
443-861 2 Aberdeen MD ABRDMDABDS0  9212 VERIZON MARYLAND, INC. 236   2009-10-11   
443-861 3 Aberdeen MD ABRDMDABDS0  9212 VERIZON MARYLAND, INC. 236   2009-10-11   
443-861 4 Aberdeen MD ABRDMDABDS0  9212 VERIZON MARYLAND, INC. 236   2009-10-11   
443-861 5 Aberdeen MD ABRDMDABDS0  9212 VERIZON MARYLAND, INC. 236   2009-10-11   
443-861 6 Aberdeen MD ABRDMDABDS0  9212 VERIZON MARYLAND, INC. 236   2009-10-11   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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