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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
443-988 7 Centreville MD   876D ONVOY, LLC - MD 242   2017-04-13   
443-988 8 Centreville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2006-09-01   
443-988 9 Centreville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2017-08-31   
443-989 A Glen Burnie MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-989 0 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-989 1 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-989 2 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-989 3 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-989 4 Glen Burnie MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2021-05-28   
443-989 5 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-989 6 Glen Burnie MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-07-06   
443-989 7 Glen Burnie MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-09-14   
443-989 8 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-03   
443-989 9 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-990 A Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-990 0 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-04-02   
443-990 1 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-04-02   
443-990 2 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-05-07   
443-990 3 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-05-07   
443-990 4 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-05-07   
443-990 5 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-05-07   
443-990 6 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-05-07   
443-990 7 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2012-09-20   
443-990 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2012-11-25   
443-990 9 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2012-12-20   
443-991 A Towson MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-991 0 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-11-15   
443-991 1 Towson MD   5562 METROPCS, INC. 238   2013-06-14   
443-991 2 Towson MD   5562 METROPCS, INC. 238   2013-06-14   
443-991 3 Towson MD   5562 METROPCS, INC. 238   2013-06-14   
443-991 4 Towson MD   318J COMCAST IP PHONE, LLC 238   2014-03-26   
443-991 5 Towson MD   318J COMCAST IP PHONE, LLC 238   2015-04-14   
443-991 6 Towson MD   5562 METROPCS, INC. 238   2013-08-01   
443-991 7 Towson MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2012-02-27   
443-991 8 Towson MD   876D ONVOY, LLC - MD 238   2012-02-29   
443-991 9 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-11-01   
443-992 A Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-992 0 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2003-04-09   
443-992 1 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2003-04-09   
443-992 2 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2003-04-09   
443-992 3 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2003-04-09   
443-992 4 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-992 5 Baltimore MD   5562 METROPCS, INC. 238   2003-04-09   
443-992 6 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2003-04-09   
443-992 7 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2004-09-03   
443-992 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2003-05-14   
443-992 9 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2003-05-14   
443-993 A Elkton MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-993 0 Elkton MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-993 1 Elkton MD   5562 METROPCS, INC. 238   2012-10-11   

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

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