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: 203

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-203 A West River MD MAYOMDMYRS1  9212 VERIZON MARYLAND, INC. 238      
443-203 0 West River MD MAYOMDMYRS1  9212 VERIZON MARYLAND, INC. 238      
443-203 1 West River MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-203 2 West River MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-203 3 West River MD   145J TERRA NOVA TELECOM INC. 238      
443-203 4 West River MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-203 5 West River MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-203 6 West River MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-203 7 West River MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238      
443-203 8 West River MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-203 9 West River MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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