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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
443-828 1 Ellicott City MD   829J PAETEC ITEL, LLC 238      
443-828 2 Ellicott City MD   515J IP HORIZON LLC 238   2013-09-06   
443-828 3 Ellicott City MD   829J PAETEC ITEL, LLC 238      
443-828 4 Ellicott City MD   829J PAETEC ITEL, LLC 238      
443-828 5 Ellicott City MD   829J PAETEC ITEL, LLC 238      
443-828 6 Ellicott City MD   829J PAETEC ITEL, LLC 238      
443-828 7 Ellicott City MD   508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-828 8 Ellicott City MD   829J PAETEC ITEL, LLC 238      
443-828 9 Ellicott City MD   829J PAETEC ITEL, LLC 238      
443-829 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-829 0 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-829 1 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-829 2 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-829 3 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-829 4 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-829 5 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-829 6 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-829 7 Baltimore MD   5562 METROPCS, INC. 238      
443-829 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-829 9 Baltimore MD   5562 METROPCS, INC. 238      
443-830 A Catonsville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-830 0 Catonsville MD   829J PAETEC ITEL, LLC 238      
443-830 1 Catonsville MD   829J PAETEC ITEL, LLC 238      
443-830 2 Catonsville MD   829J PAETEC ITEL, LLC 238      
443-830 3 Catonsville MD   876D ONVOY, LLC - MD 238   2021-09-23   
443-830 4 Catonsville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2024-11-18   
443-830 5 Catonsville MD   876D ONVOY, LLC - MD 238   2021-07-11   
443-830 6 Catonsville MD   876D ONVOY, LLC - MD 238   2021-07-11   
443-830 7 Catonsville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-10-10   
443-830 8 Catonsville MD   197D VONAGE AMERICA LLC 238   2022-10-07   
443-830 9 Catonsville MD   624H ONVOY SPECTRUM, LLC 238   2021-05-22   
443-831 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-832 A Columbia MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-832 0 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-28   
443-832 1 Columbia MD   829J PAETEC ITEL, LLC 238   2009-10-26   
443-832 2 Columbia MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2009-11-13   
443-832 3 Columbia MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-08-15   
443-832 4 Columbia MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-832 5 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-28   
443-832 6 Columbia MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2013-07-21   
443-832 7 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-11-01   
443-832 8 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-07-15   
443-832 9 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-07-15   
443-833 A Arbutus MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-833 0 Arbutus MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-04-19   
443-833 1 Arbutus MD   829J PAETEC ITEL, LLC 238   2002-11-19   
443-833 2 Arbutus MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2014-11-01   
443-833 3 Arbutus MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-833 4 Arbutus MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-11-17   
443-833 5 Arbutus MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-08-29   

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

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