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: 620

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-620 A Waterloo MD CLMAMDNIDS1  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-620 0 Waterloo MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-620 1 Waterloo MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-620 2 Waterloo MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-620 3 Waterloo MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-620 4 Waterloo MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-620 5 Waterloo MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-620 6 Waterloo MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-620 7 Waterloo MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238      
443-620 8 Waterloo MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-620 9 Waterloo MD CLMAMDNIDS1  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      

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

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