Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 367

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-367 A Columbia MD CLMAMDCBDS0  9212 VERIZON MARYLAND, INC. 238      
443-367 0 Columbia MD CLMAMDCBDS0  9212 VERIZON MARYLAND, INC. 238      
443-367 1 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2005-07-02   
443-367 2 Columbia MD CLMAMDCBDS0  9212 VERIZON MARYLAND, INC. 238      
443-367 3 Columbia MD CLMAMDCBDS0  9212 VERIZON MARYLAND, INC. 238      
443-367 4 Columbia MD CLMAMDJTBMD  2589 US LEC OF MARYLAND, INC. 238   2007-06-15   
443-367 5 Columbia MD CLMAMDCBDS0  9212 VERIZON MARYLAND, INC. 238      
443-367 6 Columbia MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
443-367 7 Columbia MD CLMAMDCBDS0  9212 VERIZON MARYLAND, INC. 238      
443-367 8 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-28   
443-367 9 Columbia MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2011-04-03   

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

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