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: 371

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-371 A Bel Air MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-371 0 Bel Air MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-26   
443-371 1 Bel Air MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2016-02-06   
443-371 2 Bel Air MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2013-09-30   
443-371 3 Bel Air MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-28   
443-371 4 Bel Air MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238   2006-04-08   
443-371 5 Bel Air MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2006-05-27   
443-371 6 Bel Air MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2007-09-20   
443-371 7 Bel Air MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2007-09-20   
443-371 8 Bel Air MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-05-13   
443-371 9 Bel Air MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-01   

Last updated: Tue, 04 May 2021 15:04:27 UTC

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