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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
443-579 2 Essex MD   829J PAETEC ITEL, LLC 238      
443-579 3 Essex MD   829J PAETEC ITEL, LLC 238      
443-579 4 Essex MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-06-26   
443-579 5 Essex MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-579 6 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-07-17   
443-579 7 Essex MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-579 8 Essex MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-02-26   
443-579 9 Essex MD   829J PAETEC ITEL, LLC 238      
443-580 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2024-02-09   
443-580 0 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 1 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 2 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 3 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 4 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 5 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 6 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-04-13   
443-580 7 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-580 9 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-27   
443-581 A Chase MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-581 0 Chase MD   876D ONVOY, LLC - MD 238   2021-03-04   
443-581 1 Chase MD   876D ONVOY, LLC - MD 238   2021-03-04   
443-581 3 Chase MD   145J TERRA NOVA TELECOM INC. 238   2024-09-12   
443-581 5 Chase MD   624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-581 6 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
443-581 7 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
443-581 8 Chase MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2019-07-06   
443-581 9 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-582 A Churchville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-582 0 Churchville MD   073H TELNYX LLC 238   2017-04-26   
443-582 1 Churchville MD   829J PAETEC ITEL, LLC 238      
443-582 2 Churchville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
443-582 3 Churchville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-05-29   
443-582 4 Churchville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-582 5 Churchville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-582 6 Churchville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
443-582 7 Churchville MD   624H ONVOY SPECTRUM, LLC 238   2021-05-28   
443-582 8 Churchville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-07-28   
443-582 9 Churchville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-05-31   
443-583 A Columbia MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-583 0 Columbia MD   876D ONVOY, LLC - MD 238   2016-03-03   
443-583 1 Columbia MD   829J PAETEC ITEL, LLC 238      
443-583 2 Columbia MD   2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2016-01-31   
443-583 3 Columbia MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-583 4 Columbia MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-583 5 Columbia MD   876D ONVOY, LLC - MD 238   2014-09-01   
443-583 6 Columbia MD   5562 METROPCS, INC. 238   2015-05-29   
443-583 7 Columbia MD   318J COMCAST IP PHONE, LLC 238   2014-09-16   
443-583 8 Columbia MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-583 9 Columbia MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-11-08   

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

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