Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 605 [Rate centres in NPA 605] [Dial plan for NPA 605]

NXX: 638

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-638 A Vermillion SD VRMLSDCODS0  9631 QWEST CORPORATION 640      
605-638 0 Vermillion SD   9631 QWEST CORPORATION 640      
605-638 1 Vermillion SD   9631 QWEST CORPORATION 640      
605-638 2 Vermillion SD   516J TON80 COMMUNICATIONS, LLC 640   2022-04-01   
605-638 3 Vermillion SD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 640   2016-11-28   
605-638 4 Vermillion SD   162G ONVOY, LLC - SD 640   2013-12-16   
605-638 5 Vermillion SD   162G ONVOY, LLC - SD 640   2013-12-16   
605-638 6 Vermillion SD   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640   2006-12-30   
605-638 7 Vermillion SD   162G ONVOY, LLC - SD 640   2009-05-28   
605-638 8 Vermillion SD   9631 QWEST CORPORATION 640      
605-638 9 Vermillion SD   580H AIRUS, INC. - SD 640   2016-12-11   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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