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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
443-952 0 Westminster MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-11-06   
443-952 1 Westminster MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-07-03   
443-952 2 Westminster MD   876D ONVOY, LLC - MD 238   2016-03-10   
443-952 3 Westminster MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-05-31   
443-952 4 Westminster MD   876D ONVOY, LLC - MD 238   2015-10-05   
443-952 5 Westminster MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2013-08-23   
443-952 6 Westminster MD   876D ONVOY, LLC - MD 238   2014-09-05   
443-952 7 Westminster MD   318J COMCAST IP PHONE, LLC 238   2011-12-22   
443-952 8 Westminster MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-952 9 Westminster MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-953 A Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-953 0 Salisbury MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2011-11-06   
443-953 1 Salisbury MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2016-06-04   
443-953 2 Salisbury MD   5562 METROPCS, INC. 242   2018-01-06   
443-953 3 Salisbury MD   5562 METROPCS, INC. 242   2018-03-24   
443-953 4 Salisbury MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2018-07-20   
443-953 5 Salisbury MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2018-07-20   
443-953 6 Salisbury MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2022-03-19   
443-953 7 Salisbury MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2023-06-29   
443-953 8 Salisbury MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2014-03-22   
443-953 9 Salisbury MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2014-03-22   
443-954 A Baltimore MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-954 0 Baltimore MD   829J PAETEC ITEL, LLC 238   2005-08-27   
443-954 1 Baltimore MD   829J PAETEC ITEL, LLC 238   2005-08-27   
443-954 2 Baltimore MD   829J PAETEC ITEL, LLC 238   2005-08-27   
443-954 3 Baltimore MD   829J PAETEC ITEL, LLC 238   2005-08-27   
443-954 4 Baltimore MD   829J PAETEC ITEL, LLC 238   2005-08-27   
443-954 5 Baltimore MD   829J PAETEC ITEL, LLC 238   2005-08-27   
443-954 6 Baltimore MD   829J PAETEC ITEL, LLC 238   2005-08-27   
443-954 7 Baltimore MD   829J PAETEC ITEL, LLC 238   2005-08-27   
443-954 8 Baltimore MD   829J PAETEC ITEL, LLC 238   2005-08-27   
443-954 9 Baltimore MD   829J PAETEC ITEL, LLC 238   2005-08-27   
443-955 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-955 0 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-05-06   
443-955 1 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-05-08   
443-955 2 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-06-02   
443-955 3 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-06-02   
443-955 4 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-06-02   
443-955 5 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-06-26   
443-955 6 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-06-26   
443-955 7 Baltimore MD   829J PAETEC ITEL, LLC 238   2007-11-10   
443-955 8 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-03   
443-955 9 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-03   
443-956 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-957 A Baltimore MD BLTMMDCHXAX  7421 AT&T - LOCAL 238      
443-957 0 Baltimore MD   876D ONVOY, LLC - MD 238   2025-01-06   
443-957 1 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-03-12   
443-957 2 Baltimore MD   7421 AT&T - LOCAL 238      
443-957 3 Baltimore MD   876D ONVOY, LLC - MD 238   2025-01-06   
443-957 4 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2004-05-29   

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

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