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
443-542 4 Columbia MD   9212 VERIZON MARYLAND, INC. 238   2004-12-20   
443-542 5 Columbia MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238   2004-06-25   
443-542 6 Columbia MD   9212 VERIZON MARYLAND, INC. 238   2004-12-20   
443-542 7 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-02-02   
443-542 8 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-09-01   
443-542 9 Columbia MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2007-01-19   
443-543 A Arbutus MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
443-543 0 Arbutus MD   9212 VERIZON MARYLAND, INC. 238      
443-543 1 Arbutus MD   9212 VERIZON MARYLAND, INC. 238      
443-543 2 Arbutus MD   9212 VERIZON MARYLAND, INC. 238      
443-543 3 Arbutus MD   9212 VERIZON MARYLAND, INC. 238      
443-543 4 Arbutus MD   4749 TELCOVE OPERATIONS, INC. - MD 238   2005-08-22   
443-543 5 Arbutus MD   9212 VERIZON MARYLAND, INC. 238      
443-543 6 Arbutus MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-02   
443-543 7 Arbutus MD   8864 BROADWING COMMUNICATIONS. LLC - MD 238   2002-08-20   
443-543 8 Arbutus MD   876D ONVOY, LLC - MD 238   2014-10-06   
443-543 9 Arbutus MD   876D ONVOY, LLC - MD 238   2014-10-06   
443-544 A Pikesville MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-544 0 Pikesville MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-544 1 Pikesville MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-544 2 Pikesville MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-544 3 Pikesville MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-544 4 Pikesville MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-544 5 Pikesville MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-544 6 Pikesville MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-544 7 Pikesville MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2013-04-10   
443-544 8 Pikesville MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-544 9 Pikesville MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-545 A Columbia MD BLTMMDCHXZY  8864 BROADWING COMMUNICATIONS. LLC - MD 238      
443-545 0 Columbia MD   8864 BROADWING COMMUNICATIONS. LLC - MD 238      
443-545 1 Columbia MD   8864 BROADWING COMMUNICATIONS. LLC - MD 238      
443-545 2 Columbia MD   8864 BROADWING COMMUNICATIONS. LLC - MD 238      
443-545 3 Columbia MD   8864 BROADWING COMMUNICATIONS. LLC - MD 238      
443-545 4 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-04-04   
443-545 5 Columbia MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2006-06-03   
443-545 6 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-08-01   
443-545 7 Columbia MD   876D ONVOY, LLC - MD 238   2016-03-03   
443-545 8 Columbia MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-09-19   
443-545 9 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-10-03   
443-546 A Columbia MD CLMAMDCBDS0  9212 VERIZON MARYLAND, INC. 238      
443-546 0 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-03   
443-546 1 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-546 2 Columbia MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2007-08-24   
443-546 3 Columbia MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2006-09-15   
443-546 4 Columbia MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2006-09-15   
443-546 5 Columbia MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-07-11   
443-546 6 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-22   
443-546 7 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-01   
443-546 8 Columbia MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-10-10   
443-546 9 Columbia MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-04-24   

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Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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