Local Calling Guide

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Search area code/prefix (NPA/NXX)
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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 412

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-412 A Churchville MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-412 0 Churchville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
443-412 1 Churchville MD   829J PAETEC ITEL, LLC 238   2004-01-10   
443-412 2 Churchville MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2008-08-24   
443-412 3 Churchville MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2008-09-02   
443-412 4 Churchville MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-412 5 Churchville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-10-14   
443-412 6 Churchville MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-412 7 Churchville MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-412 8 Churchville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-25   
443-412 9 Churchville MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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