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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
443-431 A Randallstown MD BLTQMD01BMD  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-431 0 Randallstown MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2020-04-06   
443-431 1 Randallstown MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-05-14   
443-431 2 Randallstown MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-31   
443-431 3 Randallstown MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-24   
443-431 4 Randallstown MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-24   
443-431 5 Randallstown MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-431 6 Randallstown MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-431 7 Randallstown MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-431 8 Randallstown MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-10-19   
443-431 9 Randallstown MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-08-27   
443-432 A Prince Frederick MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-432 0 Prince Frederick MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2015-12-07   
443-432 1 Prince Frederick MD   829J PAETEC ITEL, LLC 238      
443-432 2 Prince Frederick MD   876D ONVOY, LLC - MD 238   2014-10-20   
443-432 3 Prince Frederick MD   318J COMCAST IP PHONE, LLC 238   2014-10-15   
443-432 4 Prince Frederick MD   876D ONVOY, LLC - MD 238   2014-10-20   
443-432 5 Prince Frederick MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-08   
443-432 6 Prince Frederick MD   515J IP HORIZON LLC 238   2015-03-23   
443-432 7 Prince Frederick MD   508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-432 8 Prince Frederick MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-10-10   
443-432 9 Prince Frederick MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2013-12-27   
443-433 A Annapolis MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-433 0 Annapolis MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-433 1 Annapolis MD   829J PAETEC ITEL, LLC 238   2005-10-07   
443-433 2 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-03-02   
443-433 3 Annapolis MD   829J PAETEC ITEL, LLC 238   2005-04-18   
443-433 4 Annapolis MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-433 5 Annapolis MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-433 6 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-03-02   
443-433 7 Annapolis MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-433 8 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-03-02   
443-433 9 Annapolis MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-08-19   
443-434 A Federalsburg MD SLBRMDSBWMD  073H TELNYX LLC 242      
443-434 0 Federalsburg MD   876D ONVOY, LLC - MD 242   2019-03-04   
443-434 1 Federalsburg MD   073H TELNYX LLC 242   2017-09-13   
443-434 2 Federalsburg MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-06-17   
443-434 3 Federalsburg MD   318J COMCAST IP PHONE, LLC 242   2006-07-31   
443-434 4 Federalsburg MD   876D ONVOY, LLC - MD 242   2017-04-13   
443-434 5 Federalsburg MD   318J COMCAST IP PHONE, LLC 242   2015-09-21   
443-434 6 Federalsburg MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 242   2012-07-13   
443-434 7 Federalsburg MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-06-17   
443-434 8 Federalsburg MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-06-17   
443-434 9 Federalsburg MD   876D ONVOY, LLC - MD 242   2019-03-04   
443-435 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2024-02-09   
443-435 0 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-03-18   
443-435 1 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-03-18   
443-435 2 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-03-18   
443-435 3 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-03-18   
443-435 4 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-03-18   

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

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