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: 450

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-450 A Pikesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-450 0 Pikesville MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-450 1 Pikesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2012-07-29   
443-450 2 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2022-10-03   
443-450 3 Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-07-17   
443-450 4 Pikesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-450 5 Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-09-14   
443-450 6 Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2018-02-01   
443-450 7 Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2019-07-05   
443-450 8 Pikesville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-12-13   
443-450 9 Pikesville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-01-14   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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