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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
443-444 7 Baltimore MD BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238   2005-08-27   
443-444 8 Baltimore MD BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238   2005-08-27   
443-444 9 Baltimore MD BLTMMDYKDS0  9212 VERIZON MARYLAND, INC. 238   2005-08-27   
443-445 A Elkridge MD EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238      
443-445 0 Elkridge MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-25   
443-445 1 Elkridge MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2015-04-17   
443-445 2 Elkridge MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-06-26   
443-445 3 Elkridge MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2005-03-10   
443-445 4 Elkridge MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238   2005-02-15   
443-445 5 Elkridge MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238   2005-02-15   
443-445 6 Elkridge MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238   2005-02-15   
443-445 7 Elkridge MD EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238   2004-02-16   
443-445 8 Elkridge MD EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238   2004-02-16   
443-445 9 Elkridge MD BLTMMDSN5MD  4773 XO MARYLAND, LLC 238   2001-11-19   
443-446 A Queenstown MD ESTNMDES5MD  7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 242      
443-446 1 Queenstown MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC. - MD 242   2019-05-03   
443-446 2 Queenstown MD ESTNMDBNGT0  2593 CORE COMMUNICATIONS, INC. - MD 242   2019-03-29   
443-446 3 Queenstown MD   876D ONVOY, LLC - MD 242   2021-03-05   
443-446 4 Queenstown MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2018-09-13   
443-446 5 Queenstown MD   876D ONVOY, LLC - MD 242   2021-03-05   
443-446 6 Queenstown MD ESTNMDBNGT0  2593 CORE COMMUNICATIONS, INC. - MD 242   2019-03-29   
443-446 7 Queenstown MD ESTNMDBNGT0  2593 CORE COMMUNICATIONS, INC. - MD 242   2019-03-29   
443-446 8 Queenstown MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC. - MD 242   2019-05-03   
443-446 9 Queenstown MD   2593 CORE COMMUNICATIONS, INC. - MD 242   2019-05-03   
443-447 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-447 0 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-03-31   
443-447 1 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-04-01   
443-447 2 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-04-01   
443-447 3 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-04-01   
443-447 4 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-04-01   
443-447 5 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-04-01   
443-447 6 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-04-01   
443-447 7 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-04-01   
443-447 8 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-04-01   
443-447 9 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-04-01   
443-448 A Denton MD SLBRMDSBXLX  318J COMCAST IP PHONE LLC 242      
443-448 1 Denton MD   876D ONVOY, LLC - MD 242   2021-03-05   
443-448 2 Denton MD WYMLMDMWEMD  7421 AT&T LOCAL 242   2005-05-02   
443-448 3 Denton MD ESTNMDES5MD  7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 242   2015-11-02   
443-448 4 Denton MD SLBRMDSBXLX  318J COMCAST IP PHONE LLC 242   2006-07-31   
443-448 5 Denton MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2016-10-16   
443-448 6 Denton MD SLBRMDSBXUX  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 242   2014-06-25   
443-448 7 Denton MD SLBRMDSBXLX  318J COMCAST IP PHONE LLC 242   2015-03-20   
443-448 8 Denton MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2017-04-13   
443-448 9 Denton MD SLBRMD902MD  073H TELNYX LLC 242   2017-09-13   
443-449 A Baltimore MD PIVLMDPKFMD  9170 BROADVIEW NETWORKS, INC. - MD 238      
443-449 0 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-07-22   
443-449 1 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-07-22   
443-449 2 Baltimore MD PIVLMDPKFMD  9170 BROADVIEW NETWORKS, INC. - MD 238   2007-05-19   
443-449 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-04-08   

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Last updated: Sun, 28 Feb 2021 19:06:05 UTC

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