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: 201

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-201 A Westminster MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-201 0 Westminster MD   515J IP HORIZON LLC 238   2013-09-06   
443-201 1 Westminster MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-06-05   
443-201 2 Westminster MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2012-02-27   
443-201 3 Westminster MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-10-01   
443-201 4 Westminster MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2015-08-31   
443-201 5 Westminster MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-04-02   
443-201 6 Westminster MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-09-01   
443-201 7 Westminster MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-08   
443-201 8 Westminster MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-11-13   
443-201 9 Westminster MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-09-04   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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