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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
443-596 1 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2020-04-06   
443-596 2 Essex MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-596 3 Essex MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2017-08-16   
443-596 4 Essex MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-10-20   
443-596 5 Essex MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-10-20   
443-596 6 Essex MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2018-05-27   
443-596 7 Essex MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-06-11   
443-596 8 Essex MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2018-09-28   
443-596 9 Essex MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-25   
443-597 A Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-597 0 Severna Park MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-04-03   
443-597 1 Severna Park MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-04-03   
443-597 2 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2007-01-03   
443-597 3 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2007-01-03   
443-597 4 Severna Park MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2025-05-10   
443-597 5 Severna Park MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-06-20   
443-597 6 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2007-01-03   
443-597 7 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2007-01-03   
443-597 8 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2006-08-14   
443-597 9 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2005-06-05   
443-598 A Sherwood Forest MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-598 2 Sherwood Forest MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-09-06   
443-598 3 Sherwood Forest MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-598 4 Sherwood Forest MD   145J TERRA NOVA TELECOM INC. 238   2025-05-28   
443-598 5 Sherwood Forest MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-10-17   
443-598 6 Sherwood Forest MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-09-08   
443-598 7 Sherwood Forest MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-03-30   
443-598 8 Sherwood Forest MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-598 9 Sherwood Forest MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-599 A Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-599 0 Severn MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-04-08   
443-599 1 Severn MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2026-11-07   
443-599 2 Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2013-06-14   
443-599 3 Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2013-06-14   
443-599 4 Severn MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-05-09   
443-599 5 Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2020-09-06   
443-599 6 Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2015-02-01   
443-599 7 Severn MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-599 8 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-02   
443-599 9 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-600 A Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-600 0 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-600 1 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-600 2 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-04-15   
443-600 3 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-08-13   
443-600 4 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-10-09   
443-600 5 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-01-21   
443-600 6 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-600 7 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-03-30   
443-600 8 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-05-06   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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