Local Calling Guide

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

NXX: 952

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-952 A Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-952 0 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-11-06   
443-952 1 Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-07-03   
443-952 2 Westminster MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-10   
443-952 3 Westminster MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-05-31   
443-952 4 Westminster MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2015-10-05   
443-952 5 Westminster MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2013-08-23   
443-952 6 Westminster MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-05   
443-952 7 Westminster MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2011-12-22   
443-952 8 Westminster MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-952 9 Westminster MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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