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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
443-262 5 Centreville MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2005-12-02   
443-262 6 Centreville MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2006-04-01   
443-262 7 Centreville MD SLBRMD902MD  073H TELNYX LLC 242   2017-09-13   
443-262 8 Centreville MD ESTNMDESMMD  228C IDT AMERICA, CORP. - MD 242   2006-05-06   
443-262 9 Centreville MD CNVLMDCTRS2  9212 VERIZON MARYLAND, INC. 242      
443-263 A Baltimore MD BLTMMDCHDS3  9212 VERIZON MARYLAND, INC. 238      
443-264 A Pikesville MD BLTQMD01BMD  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-264 0 Pikesville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-11-04   
443-264 1 Pikesville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-11-04   
443-264 2 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-264 3 Pikesville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2018-05-31   
443-264 4 Pikesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-06-08   
443-264 5 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-264 6 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-264 7 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-264 8 Pikesville MD BLTMMDCHDMD  551G NUSO, LLC 238   2018-07-23   
443-264 9 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
443-265 A Fork MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-265 0 Fork MD   829J PAETEC ITEL, LLC 238      
443-265 1 Fork MD   829J PAETEC ITEL, LLC 238      
443-265 2 Fork MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-06-06   
443-265 3 Fork MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2025-02-24   
443-265 4 Fork MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-265 5 Fork MD   829J PAETEC ITEL, LLC 238      
443-265 6 Fork MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-265 7 Fork MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-265 8 Fork MD   515J IP HORIZON LLC 238   2016-05-31   
443-265 9 Fork MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-01-08   
443-266 A Glenwood MD   071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-266 0 Glenwood MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-09-12   
443-266 2 Glenwood MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-01-04   
443-266 3 Glenwood MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-06-04   
443-266 5 Glenwood MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-266 6 Glenwood MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-21   
443-266 7 Glenwood MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-266 8 Glenwood MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-07-21   
443-266 9 Glenwood MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
443-267 A Darlington MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-267 0 Darlington MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-267 1 Darlington MD   829J PAETEC ITEL, LLC 238   2004-02-05   
443-267 2 Darlington MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-17   
443-267 3 Darlington MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2009-03-02   
443-267 4 Darlington MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
443-267 5 Darlington MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2012-12-23   
443-267 6 Darlington MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-31   
443-267 7 Darlington MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-03-11   
443-267 8 Darlington MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-267 9 Darlington MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-268 A Baltimore MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-269 A Towson MD BLTQMD01BMD  2593 CORE COMMUNICATIONS, INC.- MD 238      

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

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