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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
443-279 1 Towson MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 2 Towson MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 3 Towson MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 4 Towson MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 5 Towson MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 6 Towson MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 7 Towson MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 8 Towson MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
443-279 9 Towson MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-280 A Sykesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-280 0 Sykesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-280 1 Sykesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-280 2 Sykesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-280 3 Sykesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-280 4 Sykesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-280 5 Sykesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-280 6 Sykesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-06-26   
443-280 7 Sykesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-280 8 Sykesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-10-01   
443-280 9 Sykesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-281 A Cockeysville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 0 Cockeysville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 1 Cockeysville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 2 Cockeysville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 3 Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-21   
443-281 5 Cockeysville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 6 Cockeysville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 7 Cockeysville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 8 Cockeysville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-08-08   
443-281 9 Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-07-31   
443-282 A Chestertown MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-282 0 Chestertown MD ESTNMDESMMD  228C IDT AMERICA, CORP. - MD 242   2006-05-06   
443-282 1 Chestertown MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2006-06-26   
443-282 2 Chestertown MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2024-04-12   
443-282 3 Chestertown MD ESTNMDES5MD  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 242   2009-03-02   
443-282 4 Chestertown MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2010-06-14   
443-282 5 Chestertown MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2011-05-02   
443-282 6 Chestertown MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2004-12-10   
443-282 7 Chestertown MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2004-12-10   
443-282 8 Chestertown MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2011-03-23   
443-282 9 Chestertown MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2017-04-13   
443-283 A Columbia MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-284 A Waterloo MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-284 2 Waterloo MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
443-284 3 Waterloo MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-284 5 Waterloo MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-284 6 Waterloo MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
443-284 7 Waterloo MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
443-285 A Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
443-285 0 Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
443-285 1 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-04-20   
443-285 2 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-09-29   
443-285 3 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-08-19   
443-285 4 Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
443-285 5 Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
443-285 6 Columbia MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-285 7 Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
443-285 8 Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
443-285 9 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-09-29   
443-286 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-287 A Baltimore MD BLTMMDWLDS0  9212 VERIZON MARYLAND, INC. 238      
443-288 A Ellicott City MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 0 Ellicott City MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 1 Ellicott City MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 2 Ellicott City MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 3 Ellicott City MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2009-10-24   
443-288 4 Ellicott City MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 5 Ellicott City MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 6 Ellicott City MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 7 Ellicott City MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 8 Ellicott City MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 9 Ellicott City MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-289 A Westminster MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-289 0 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-09-15   
443-289 1 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-09-15   
443-289 2 Westminster MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-06-30   
443-289 3 Westminster MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-06-30   
443-289 4 Westminster MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2011-10-10   
443-289 5 Westminster MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2011-10-10   
443-289 6 Westminster MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-10   
443-289 7 Westminster MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-11-23   
443-289 8 Westminster MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2012-11-24   
443-289 9 Westminster MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-02-19   
443-290 A Parkville MD BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-290 0 Parkville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-290 1 Parkville MD   515J IP HORIZON LLC 238   2013-09-06   
443-290 2 Parkville MD BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-290 3 Parkville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-29   
443-290 4 Parkville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-01-06   
443-290 5 Parkville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
443-290 6 Parkville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-290 7 Parkville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-08-15   
443-290 8 Parkville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-290 9 Parkville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-08-15   
443-291 A Hampstead MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-291 2 Hampstead MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-21   
443-291 3 Hampstead MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-09-09   
443-291 5 Hampstead MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-03-08   
443-291 6 Hampstead MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-07-20   
443-291 7 Hampstead MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-03   

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Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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