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
443-537 5 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-14   
443-537 6 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-14   
443-537 7 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-14   
443-537 8 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-14   
443-537 9 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-02-05   
443-538 A Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-539 A Columbia MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-539 0 Columbia MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-539 1 Columbia MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-539 2 Columbia MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-539 3 Columbia MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-539 4 Columbia MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238   2006-08-15   
443-539 5 Columbia MD BLTOMDKHDS0  7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2008-10-01   
443-539 6 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-28   
443-539 7 Columbia MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2010-02-15   
443-539 8 Columbia MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-13   
443-539 9 Columbia MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-540 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-541 A Cockeysville MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-541 0 Cockeysville MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-541 1 Cockeysville MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-541 2 Cockeysville MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-541 3 Cockeysville MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-541 4 Cockeysville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-08-20   
443-541 5 Cockeysville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-01-10   
443-541 6 Cockeysville MD BLTMMDCHLMD  082H LOCAL ACCESS LLC - MD 238   2016-10-14   
443-541 7 Cockeysville MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-03-14   
443-541 8 Cockeysville MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-541 9 Cockeysville MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-542 A Columbia MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2021-01-13   
443-542 0 Columbia MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238      
443-542 1 Columbia MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2004-11-25   
443-542 2 Columbia MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238      
443-542 3 Columbia MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2005-03-12   
443-542 4 Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238   2004-12-20   
443-542 5 Columbia MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238   2004-06-25   
443-542 6 Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238   2004-12-20   
443-542 7 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-02-02   
443-542 8 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-09-01   
443-542 9 Columbia MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2007-01-19   
443-543 A Arbutus MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
443-543 0 Arbutus MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
443-543 1 Arbutus MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
443-543 2 Arbutus MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
443-543 3 Arbutus MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
443-543 4 Arbutus MD BLTMMDCHBMD  4749 TELCOVE OPERATIONS, INC. - MD 238   2005-08-22   
443-543 5 Arbutus MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
443-543 6 Arbutus MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-02   
443-543 7 Arbutus MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2002-08-20   
443-543 8 Arbutus MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-10-06   

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

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