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: 406

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-406 A Elkton MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-406 0 Elkton MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2007-02-10   
443-406 1 Elkton MD   829J PAETEC ITEL, LLC 238   2002-06-24   
443-406 2 Elkton MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-03   
443-406 3 Elkton MD   318J COMCAST IP PHONE, LLC 238   2015-11-18   
443-406 4 Elkton MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2011-11-05   
443-406 5 Elkton MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2007-02-10   
443-406 6 Elkton MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-406 7 Elkton MD   318J COMCAST IP PHONE, LLC 238   2007-02-27   
443-406 8 Elkton MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-25   
443-406 9 Elkton MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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