Local Calling Guide

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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
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   

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

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