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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
443-459 6 Elkridge MD   5562 METROPCS, INC. 238   2011-09-19   
443-459 7 Elkridge MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-11-07   
443-459 8 Elkridge MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-12-12   
443-459 9 Elkridge MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-12-12   
443-460 A Essex MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-460 0 Essex MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-460 1 Essex MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-460 2 Essex MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-460 3 Essex MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-460 4 Essex MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-460 5 Essex MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-09-29   
443-460 6 Essex MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-460 7 Essex MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-460 8 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-03-31   
443-460 9 Essex MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-461 A Parkville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-461 0 Parkville MD   829J PAETEC ITEL, LLC 238      
443-461 1 Parkville MD   829J PAETEC ITEL, LLC 238      
443-461 2 Parkville MD   829J PAETEC ITEL, LLC 238      
443-461 3 Parkville MD   829J PAETEC ITEL, LLC 238      
443-461 4 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-03-02   
443-461 5 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-03-02   
443-461 6 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-03-02   
443-461 7 Parkville MD   515J IP HORIZON LLC 238   2016-10-14   
443-461 8 Parkville MD   073H TELNYX LLC 238   2017-03-14   
443-461 9 Parkville MD   829J PAETEC ITEL, LLC 238      
443-462 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-462 0 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-01-15   
443-462 1 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-04-02   
443-462 2 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-04-02   
443-462 3 Baltimore MD   9212 VERIZON MARYLAND, INC. 238   2009-04-20   
443-462 4 Baltimore MD   9212 VERIZON MARYLAND, INC. 238   2009-04-20   
443-462 5 Baltimore MD   9212 VERIZON MARYLAND, INC. 238   2009-04-20   
443-462 6 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-07-03   
443-462 7 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-07-03   
443-462 8 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-10-02   
443-462 9 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-10-02   
443-463 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-463 0 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-463 1 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-463 2 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-463 3 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-463 4 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-463 5 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-463 6 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-463 7 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-463 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-463 9 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-464 A Churchville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-464 0 Churchville MD   876D ONVOY, LLC - MD 238   2015-10-04   

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

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