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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
443-588 6 Parkville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-588 7 Parkville MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-588 8 Parkville MD   318J COMCAST IP PHONE, LLC 238   2015-04-13   
443-588 9 Parkville MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-589 A Cockeysville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-589 0 Cockeysville MD   829J PAETEC ITEL, LLC 238      
443-589 1 Cockeysville MD   829J PAETEC ITEL, LLC 238      
443-589 2 Cockeysville MD   829J PAETEC ITEL, LLC 238      
443-589 3 Cockeysville MD   829J PAETEC ITEL, LLC 238      
443-589 4 Cockeysville MD   5562 METROPCS, INC. 238   2013-06-14   
443-589 5 Cockeysville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-10-19   
443-589 6 Cockeysville MD   876D ONVOY, LLC - MD 238   2024-07-15   
443-589 7 Cockeysville MD   876D ONVOY, LLC - MD 238   2016-03-14   
443-589 8 Cockeysville MD   876D ONVOY, LLC - MD 238   2016-03-14   
443-589 9 Cockeysville MD   829J PAETEC ITEL, LLC 238      
443-590 A Reisterstown MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-590 0 Reisterstown MD   876D ONVOY, LLC - MD 238   2024-12-14   
443-590 1 Reisterstown MD   876D ONVOY, LLC - MD 238   2025-06-13   
443-590 2 Reisterstown MD   624H ONVOY SPECTRUM, LLC 238   2021-09-10   
443-590 3 Reisterstown MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-01-02   
443-590 5 Reisterstown MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-590 6 Reisterstown MD   5562 METROPCS, INC. 238   2016-12-14   
443-590 7 Reisterstown MD   876D ONVOY, LLC - MD 238   2016-03-21   
443-590 8 Reisterstown MD   964H BARR TELL USA, INC. 238   2016-12-17   
443-590 9 Reisterstown MD   876D ONVOY, LLC - MD 238   2016-03-21   
443-591 A Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-591 0 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-07-06   
443-591 1 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-09-03   
443-591 2 Glen Burnie MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-01-13   
443-591 3 Glen Burnie MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-01-13   
443-591 4 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-02-16   
443-591 5 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-03-16   
443-591 6 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-03   
443-591 7 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-14   
443-591 8 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-14   
443-591 9 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-14   
443-592 A Elkridge MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-592 0 Elkridge MD   624H ONVOY SPECTRUM, LLC 238   2022-03-18   
443-592 1 Elkridge MD   624H ONVOY SPECTRUM, LLC 238   2022-01-16   
443-592 2 Elkridge MD   624H ONVOY SPECTRUM, LLC 238   2022-03-18   
443-592 3 Elkridge MD   318J COMCAST IP PHONE, LLC 238   2017-04-18   
443-592 4 Elkridge MD   624H ONVOY SPECTRUM, LLC 238   2022-01-16   
443-592 5 Elkridge MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-592 6 Elkridge MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-592 7 Elkridge MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-592 8 Elkridge MD   515J IP HORIZON LLC 238   2019-04-26   
443-593 A Elkton MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-593 0 Elkton MD   515J IP HORIZON LLC 238   2016-01-04   
443-593 1 Elkton MD   829J PAETEC ITEL, LLC 238      
443-593 2 Elkton MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2016-03-01   

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

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