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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
443-226 9 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-227 A Port Deposit MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-227 0 Port Deposit MD   073H TELNYX LLC 238   2017-04-26   
443-227 1 Port Deposit MD   829J PAETEC ITEL, LLC 238      
443-227 2 Port Deposit MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-07   
443-227 3 Port Deposit MD   321J HD CARRIER LLC 238   2016-05-14   
443-227 4 Port Deposit MD   876D ONVOY, LLC - MD 238   2016-03-17   
443-227 5 Port Deposit MD   876D ONVOY, LLC - MD 238   2016-03-17   
443-227 6 Port Deposit MD   321J HD CARRIER LLC 238   2016-05-14   
443-227 7 Port Deposit MD   508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-227 8 Port Deposit MD   321J HD CARRIER LLC 238   2016-05-14   
443-227 9 Port Deposit MD   321J HD CARRIER LLC 238   2016-05-14   
443-228 A Chase MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-228 0 Chase MD   829J PAETEC ITEL, LLC 238      
443-228 1 Chase MD   829J PAETEC ITEL, LLC 238      
443-228 3 Chase MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-01-18   
443-228 4 Chase MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-12-12   
443-228 5 Chase MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-26   
443-228 6 Chase MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
443-228 7 Chase MD   515J IP HORIZON LLC 238   2016-05-31   
443-228 8 Chase MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-228 9 Chase MD   624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-229 A Severna Park MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-229 0 Severna Park MD   829J PAETEC ITEL, LLC 238      
443-229 1 Severna Park MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-11-30   
443-229 2 Severna Park MD   281E YMAX COMMUNICATIONS CORP. - MD 238   2009-02-12   
443-229 3 Severna Park MD   829J PAETEC ITEL, LLC 238      
443-229 4 Severna Park MD   281E YMAX COMMUNICATIONS CORP. - MD 238   2009-08-20   
443-229 5 Severna Park MD   876D ONVOY, LLC - MD 238   2025-02-01   
443-229 6 Severna Park MD   281E YMAX COMMUNICATIONS CORP. - MD 238   2009-09-25   
443-229 7 Severna Park MD   281E YMAX COMMUNICATIONS CORP. - MD 238   2009-09-25   
443-229 8 Severna Park MD   197D VONAGE AMERICA LLC 238   2022-10-07   
443-229 9 Severna Park MD   829J PAETEC ITEL, LLC 238      
443-230 A Odenton MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-230 1 Odenton MD   829J PAETEC ITEL, LLC 238      
443-230 2 Odenton MD   876D ONVOY, LLC - MD 238   2021-03-04   
443-230 3 Odenton MD   318J COMCAST IP PHONE, LLC 238   2014-07-04   
443-230 4 Odenton MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-09-08   
443-230 5 Odenton MD   876D ONVOY, LLC - MD 238   2016-03-29   
443-230 6 Odenton MD   5562 METROPCS, INC. 238   2016-11-17   
443-230 7 Odenton MD   508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-230 8 Odenton MD   515J IP HORIZON LLC 238   2016-01-04   
443-230 9 Odenton MD   515J IP HORIZON LLC 238   2015-03-23   
443-231 A Essex MD BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-231 0 Essex MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-11   
443-231 1 Essex MD   829J PAETEC ITEL, LLC 238   2005-04-29   
443-231 2 Essex MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-231 3 Essex MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-04-24   
443-231 4 Essex MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-20   
443-231 5 Essex MD   318J COMCAST IP PHONE, LLC 238   2005-03-10   

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

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