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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
443-318 1 Cockeysville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-09-04   
443-318 2 Cockeysville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2020-07-10   
443-318 3 Cockeysville MD   5562 METROPCS, INC. 238   2015-07-03   
443-318 4 Cockeysville MD   318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-318 5 Cockeysville MD   5562 METROPCS, INC. 238   2017-01-18   
443-318 6 Cockeysville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-09-28   
443-318 7 Cockeysville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2007-12-04   
443-318 8 Cockeysville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-10-14   
443-318 9 Cockeysville MD   829J PAETEC ITEL, LLC 238      
443-319 A Columbia MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-319 0 Columbia MD   829J PAETEC ITEL, LLC 238      
443-319 1 Columbia MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-08-13   
443-319 2 Columbia MD   5562 METROPCS, INC. 238   2016-01-08   
443-319 3 Columbia MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-06-16   
443-319 4 Columbia MD   829J PAETEC ITEL, LLC 238   2005-07-04   
443-319 5 Columbia MD   318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-319 6 Columbia MD   829J PAETEC ITEL, LLC 238      
443-319 7 Columbia MD   5562 METROPCS, INC. 238   2016-02-03   
443-319 8 Columbia MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-11-19   
443-319 9 Columbia MD   829J PAETEC ITEL, LLC 238      
443-320 A Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-320 0 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-320 1 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-320 2 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-320 3 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2004-12-03   
443-320 4 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-320 5 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-320 6 Baltimore MD   876D ONVOY, LLC - MD 238   2024-01-06   
443-320 7 Baltimore MD   829J PAETEC ITEL, LLC 238   2012-03-13   
443-320 8 Baltimore MD   876D ONVOY, LLC - MD 238   2024-01-06   
443-320 9 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-321 A Annapolis MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-322 A Towson MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-322 0 Towson MD   829J PAETEC ITEL, LLC 238      
443-322 1 Towson MD   829J PAETEC ITEL, LLC 238      
443-322 2 Towson MD   829J PAETEC ITEL, LLC 238      
443-322 3 Towson MD   876D ONVOY, LLC - MD 238   2020-06-04   
443-322 4 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
443-322 5 Towson MD   829J PAETEC ITEL, LLC 238      
443-322 6 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
443-322 7 Towson MD   829J PAETEC ITEL, LLC 238      
443-322 8 Towson MD   829J PAETEC ITEL, LLC 238      
443-322 9 Towson MD   829J PAETEC ITEL, LLC 238      
443-323 A Sharptown MD   829J PAETEC ITEL, LLC 242   2025-04-01   
443-323 0 Sharptown MD   876D ONVOY, LLC - MD 242   2020-04-30   
443-323 1 Sharptown MD   876D ONVOY, LLC - MD 242   2020-07-04   
443-323 2 Sharptown MD   876D ONVOY, LLC - MD 242   2020-07-04   
443-323 3 Sharptown MD   318J COMCAST IP PHONE, LLC 242   2006-07-31   
443-323 4 Sharptown MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-02   
443-323 5 Sharptown MD   145J TERRA NOVA TELECOM INC. 242   2024-02-15   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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