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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
443-674 1 North East MD   829J PAETEC ITEL, LLC 238   2004-02-05   
443-674 2 North East MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-10-18   
443-674 3 North East MD   5562 METROPCS, INC. 238   2019-01-22   
443-674 4 North East MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-674 5 North East MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-674 6 North East MD   5562 METROPCS, INC. 238   2017-04-04   
443-674 7 North East MD   5562 METROPCS, INC. 238   2017-08-13   
443-674 8 North East MD   318J COMCAST IP PHONE, LLC 238   2005-07-25   
443-674 9 North East MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-675 A Randallstown MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-675 0 Randallstown MD   829J PAETEC ITEL, LLC 238      
443-675 1 Randallstown MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2020-06-11   
443-675 2 Randallstown MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-09-19   
443-675 3 Randallstown MD   876D ONVOY, LLC - MD 238   2025-10-30   
443-675 4 Randallstown MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
443-675 5 Randallstown MD   964H BARR TELL USA, INC. 238   2016-12-17   
443-675 6 Randallstown MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-02   
443-675 7 Randallstown MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-02   
443-675 8 Randallstown MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-04   
443-675 9 Randallstown MD   829J PAETEC ITEL, LLC 238      
443-676 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-677 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-677 0 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-677 1 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-677 2 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-677 3 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-677 4 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-677 5 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-677 6 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-677 7 Baltimore MD   5562 METROPCS, INC. 238      
443-677 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-677 9 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-678 A Parkville MD WHMRMDWMRS2  9212 VERIZON MARYLAND, INC. 238      
443-678 0 Parkville MD   876D ONVOY, LLC - MD 238   2014-08-31   
443-678 1 Parkville MD   9212 VERIZON MARYLAND, INC. 238      
443-678 2 Parkville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2016-02-05   
443-678 3 Parkville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-06-11   
443-678 4 Parkville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-678 5 Parkville MD   876D ONVOY, LLC - MD 238   2024-02-23   
443-678 6 Parkville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-678 7 Parkville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-678 8 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-11-27   
443-678 9 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-11-27   
443-679 A Severn MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-679 0 Severn MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-04-22   
443-679 1 Severn MD   829J PAETEC ITEL, LLC 238   2002-04-22   
443-679 2 Severn MD   5562 METROPCS, INC. 238   2018-02-08   
443-679 3 Severn MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-679 4 Severn MD   318J COMCAST IP PHONE, LLC 238   2016-12-15   
443-679 5 Severn MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-06-18   

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

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