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:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-231 A Essex MD BLTMMDCHDS7  7421 AT&T LOCAL 238      
443-231 0 Essex MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-11   
443-231 1 Essex MD   2697 CTC COMMUNICATIONS CORP. - MD 238   2005-04-29   
443-231 2 Essex MD   7421 AT&T LOCAL 238      
443-231 3 Essex MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-04-24   
443-231 4 Essex MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-20   
443-231 5 Essex MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2005-03-10   
443-231 6 Essex MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2006-06-20   
443-231 7 Essex MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2006-06-20   
443-231 8 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-08-25   
443-231 9 Essex MD   082H LOCAL ACCESS LLC - MD 238   2016-05-31   

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

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