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: 300

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-300 A Sykesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-300 0 Sykesville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-300 1 Sykesville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-300 2 Sykesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-300 3 Sykesville MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-300 4 Sykesville MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
443-300 6 Sykesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-300 7 Sykesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-300 8 Sykesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-300 9 Sykesville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      

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

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