Local Calling Guide

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

NXX: 535

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-535 A Columbia MD CLVLMDCEDS0  9212 VERIZON MARYLAND, INC. 238      
443-535 0 Columbia MD CLVLMDCEDS0  9212 VERIZON MARYLAND, INC. 238      
443-535 1 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-05-20   
443-535 2 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2005-09-15   
443-535 3 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2006-01-21   
443-535 4 Columbia MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2006-05-15   
443-535 5 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2007-02-08   
443-535 6 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-03-21   
443-535 7 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2009-07-09   
443-535 8 Columbia MD CLVLMDCEDS0  9212 VERIZON MARYLAND, INC. 238      
443-535 9 Columbia MD CLVLMDCEDS0  9212 VERIZON MARYLAND, INC. 238      

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

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