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: 559

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-559 A Essex MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2021-01-13   
443-559 0 Essex MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238      
443-559 1 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-04   
443-559 2 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-03-02   
443-559 3 Essex MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC. - MD 238   2019-04-30   
443-559 4 Essex MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-04-29   
443-559 5 Essex MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2007-10-29   
443-559 6 Essex MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2007-10-29   
443-559 7 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-06-16   
443-559 8 Essex MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2008-06-16   
443-559 9 Essex MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2008-06-16   

Last updated: Tue, 04 May 2021 15:04:27 UTC

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