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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
443-664 9 Ocean City MD   829J PAETEC ITEL, LLC 242      
443-665 A Nanticoke MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC.- MD 242      
443-665 0 Nanticoke MD   876D ONVOY, LLC - MD 242   2020-04-30   
443-665 1 Nanticoke MD   624H ONVOY SPECTRUM, LLC 242   2021-05-27   
443-665 2 Nanticoke MD   876D ONVOY, LLC - MD 242   2023-05-18   
443-665 3 Nanticoke MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-06-17   
443-665 4 Nanticoke MD   318J COMCAST IP PHONE, LLC 242   2006-07-31   
443-665 5 Nanticoke MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-06-17   
443-665 6 Nanticoke MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-02   
443-665 7 Nanticoke MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-06-17   
443-665 8 Nanticoke MD   876D ONVOY, LLC - MD 242   2020-04-30   
443-665 9 Nanticoke MD   876D ONVOY, LLC - MD 242   2020-04-30   
443-666 A Chestertown MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242      
443-666 0 Chestertown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2018-01-25   
443-666 1 Chestertown MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2021-04-08   
443-666 2 Chestertown MD   829J PAETEC ITEL, LLC 242   2014-11-08   
443-666 3 Chestertown MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2012-08-02   
443-666 4 Chestertown MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2016-03-11   
443-666 5 Chestertown MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-02   
443-666 6 Chestertown MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 242   2014-10-20   
443-666 7 Chestertown MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2018-08-27   
443-666 8 Chestertown MD   073H TELNYX LLC 242   2017-09-13   
443-666 9 Chestertown MD   5562 METROPCS, INC. 242   2021-05-10   
443-667 A Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-667 0 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2023-07-20   
443-667 1 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2024-04-04   
443-667 2 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2024-06-06   
443-667 3 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2025-04-12   
443-667 4 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2025-01-09   
443-667 5 Delmar MD   939H COMMIO, LLC 242   2023-09-30   
443-667 6 Delmar MD   939H COMMIO, LLC 242   2023-09-30   
443-667 7 Delmar MD   939H COMMIO, LLC 242   2023-09-30   
443-667 8 Delmar MD   939H COMMIO, LLC 242   2023-09-30   
443-667 9 Delmar MD   939H COMMIO, LLC 242   2023-09-30   
443-668 A Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 0 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 1 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 2 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 3 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 4 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 5 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 6 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 7 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 8 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 9 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-04-27   
443-669 A Delmar MD   829J PAETEC ITEL, LLC 242   2025-04-01   
443-669 1 Delmar MD   318J COMCAST IP PHONE, LLC 242   2021-03-08   
443-669 2 Delmar MD   829J PAETEC ITEL, LLC 242      
443-669 3 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-01-29   
443-669 4 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-02-26   

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

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