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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
443-572 9 Glen Burnie MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-08-17   
443-573 A Baltimore MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-573 0 Baltimore MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-573 1 Baltimore MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-573 2 Baltimore MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-573 3 Baltimore MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-573 4 Baltimore MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-573 5 Baltimore MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2005-08-30   
443-573 6 Baltimore MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-573 7 Baltimore MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-04-13   
443-573 8 Baltimore MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-573 9 Baltimore MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-574 A Ellicott City MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-574 0 Ellicott City MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-574 1 Ellicott City MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-574 2 Ellicott City MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-574 3 Ellicott City MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-574 4 Ellicott City MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-574 5 Ellicott City MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-02-26   
443-574 6 Ellicott City MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-19   
443-574 7 Ellicott City MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-28   
443-574 8 Ellicott City MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2003-05-25   
443-574 9 Ellicott City MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-575 A Arbutus MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-575 0 Arbutus MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-575 1 Arbutus MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-575 2 Arbutus MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-575 3 Arbutus MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-575 4 Arbutus MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2006-11-09   
443-575 5 Arbutus MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-575 6 Arbutus MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-04-10   
443-575 7 Arbutus MD PIVLMDPKXFX  829J PAETEC ITEL, LLC 238   2011-12-20   
443-575 8 Arbutus MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-575 9 Arbutus MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-23   
443-576 A Randallstown MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-576 0 Randallstown MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-576 1 Randallstown MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-576 2 Randallstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-14   
443-576 3 Randallstown MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-576 4 Randallstown MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-576 5 Randallstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-14   
443-576 6 Randallstown MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-06-26   
443-576 7 Randallstown MD   876D ONVOY, LLC - MD 238   2026-09-19   
443-576 8 Randallstown MD   515J IP HORIZON LLC 238   2016-01-04   
443-576 9 Randallstown MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-25   
443-577 A Glen Burnie MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-577 0 Glen Burnie MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-577 1 Glen Burnie MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-577 2 Glen Burnie MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-577 3 Glen Burnie MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      

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

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