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: 456

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-456 A Edgewood MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-456 0 Edgewood MD   515J IP HORIZON LLC 238   2013-09-06   
443-456 1 Edgewood MD   5562 METROPCS, INC. 238   2020-10-05   
443-456 2 Edgewood MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-456 3 Edgewood MD   318J COMCAST IP PHONE, LLC 238   2013-05-12   
443-456 4 Edgewood MD   876D ONVOY, LLC - MD 238   2016-01-21   
443-456 5 Edgewood MD   515J IP HORIZON LLC 238   2016-10-14   
443-456 6 Edgewood MD   318J COMCAST IP PHONE, LLC 238   2014-03-24   
443-456 7 Edgewood MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-456 8 Edgewood MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-05-29   
443-456 9 Edgewood MD   8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-11   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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