Local Calling Guide

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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
443-482 2 Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-482 3 Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-482 4 Annapolis MD   145J TERRA NOVA TELECOM INC. 238   2022-11-07   
443-482 5 Annapolis MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2006-11-03   
443-482 6 Annapolis MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2006-11-03   
443-482 7 Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-482 8 Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-482 9 Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-483 A Cardiff MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-483 0 Cardiff MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-02-25   
443-483 1 Cardiff MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-483 2 Cardiff MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-483 3 Cardiff MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-07   
443-483 4 Cardiff MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2004-02-07   
443-483 5 Cardiff MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-02-13   
443-483 6 Cardiff MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-07   
443-483 7 Cardiff MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-07   
443-483 8 Cardiff MD   145J TERRA NOVA TELECOM INC. 238   2021-01-27   
443-483 9 Cardiff MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-02-13   
443-484 A Edgewood MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-484 0 Edgewood MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-11   
443-484 1 Edgewood MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-03-14   
443-484 2 Edgewood MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-12-05   
443-484 3 Edgewood MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-12-24   
443-484 4 Edgewood MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-484 5 Edgewood MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-12-22   
443-484 6 Edgewood MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2015-12-27   
443-484 7 Edgewood MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-10-24   
443-484 8 Edgewood MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-05-29   
443-484 9 Edgewood MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-01-27   
443-485 A Elkton MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-485 0 Elkton MD BLTMMDCH40Z  6626 OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 238   2021-11-04   
443-485 1 Elkton MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-02-27   
443-485 2 Elkton MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-12-09   
443-485 3 Elkton MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-11-26   
443-485 4 Elkton MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2021-10-08   
443-485 5 Elkton MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-05-16   
443-485 6 Elkton MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-10-29   
443-485 7 Elkton MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-02-10   
443-485 8 Elkton MD BLTMMDCH40Z  6626 OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 238   2011-02-26   
443-485 9 Elkton MD   145J TERRA NOVA TELECOM INC. 238   2021-07-16   
443-486 A Prince Frederick MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-486 0 Prince Frederick MD   145J TERRA NOVA TELECOM INC. 238   2021-07-16   
443-486 1 Prince Frederick MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-10   
443-486 2 Prince Frederick MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-03-14   
443-486 3 Prince Frederick MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-10   
443-486 4 Prince Frederick MD PRFRMDPFRS1  9212 VERIZON MARYLAND, INC. 238   2004-07-15   
443-486 5 Prince Frederick MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-09-06   
443-486 6 Prince Frederick MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-09-23   
443-486 7 Prince Frederick MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-13   
443-486 8 Prince Frederick MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2008-03-31   
443-486 9 Prince Frederick MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2021-12-15   
443-487 A Westminster MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-487 0 Westminster MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2022-10-16   
443-487 1 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-03-03   
443-487 2 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-04-04   
443-487 3 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-02-02   
443-487 4 Westminster MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-05   
443-487 5 Westminster MD   829J PAETEC ITEL, LLC 238   2002-11-16   
443-487 6 Westminster MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-09-03   
443-487 7 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-09-21   
443-487 8 Westminster MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2002-11-25   
443-487 9 Westminster MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2021-10-08   
443-488 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-488 0 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-08-14   
443-488 1 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-08-14   
443-488 2 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-08-14   
443-488 3 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-08-14   
443-488 4 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-08-14   
443-488 5 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-20   
443-488 6 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-20   
443-488 7 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-20   
443-488 8 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-20   
443-488 9 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-20   
443-489 A Chase MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-489 0 Chase MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2001-11-19   
443-489 1 Chase MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-489 2 Chase MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-24   
443-489 3 Chase MD   829J PAETEC ITEL, LLC 238   2007-01-24   
443-489 4 Chase MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-24   
443-489 5 Chase MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-489 6 Chase MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-02-13   
443-489 7 Chase MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-489 8 Chase MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-489 9 Chase MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-490 A Edgewood MD   071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-490 1 Edgewood MD   145J TERRA NOVA TELECOM INC. 238   2025-05-07   
443-490 2 Edgewood MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2016-07-28   
443-490 3 Edgewood MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2016-08-04   
443-490 5 Edgewood MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-11-30   
443-490 6 Edgewood MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-10-19   
443-490 7 Edgewood MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-10-19   
443-490 8 Edgewood MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-490 9 Edgewood MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2017-10-14   
443-491 A Parkton MD   876D ONVOY, LLC - MD 238      
443-491 2 Parkton MD   829J PAETEC ITEL, LLC 238   2005-10-07   
443-491 3 Parkton MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-491 7 Parkton MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2020-09-04   
443-491 8 Parkton MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-18   
443-491 9 Parkton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   

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Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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