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
443-648 A Essex MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-648 0 Essex MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-12-09   
443-648 1 Essex MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-08-23   
443-648 2 Essex MD   2589 US LEC OF MARYLAND, INC. 238   2007-06-15   
443-648 3 Essex MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-02   
443-648 4 Essex MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-648 5 Essex MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-02-13   
443-648 6 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-04-12   
443-648 7 Essex MD   7575 CENTURYLINK COMMUNICATIONS LLC 238   2014-06-25   
443-648 8 Essex MD   082H LOCAL ACCESS LLC - MD 238   2013-09-06   
443-648 9 Essex MD   876D ONVOY, LLC - MD 238   2012-10-07   

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

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