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: 674

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-674 A North East MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-674 0 North East MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-26   
443-674 1 North East MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238   2004-02-05   
443-674 2 North East MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-10-18   
443-674 3 North East MD BLTMMDCHFMD  5562 METROPCS, INC. 238   2019-01-22   
443-674 4 North East MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-674 5 North East MD BLTMMD91DS1  2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-674 6 North East MD BLTMMDCHFMD  5562 METROPCS, INC. 238   2017-04-04   
443-674 7 North East MD BLTMMDCHFMD  5562 METROPCS, INC. 238   2017-08-13   
443-674 8 North East MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2005-07-25   
443-674 9 North East MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      

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

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