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: 731

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-731 A Sioux Falls SD SXFLSDCODS2  9631 QWEST CORPORATION 640      
605-731 0 Sioux Falls SD   9631 QWEST CORPORATION 640      
605-731 1 Sioux Falls SD   9631 QWEST CORPORATION 640      
605-731 2 Sioux Falls SD   9631 QWEST CORPORATION 640      
605-731 3 Sioux Falls SD   9631 QWEST CORPORATION 640      
605-731 4 Sioux Falls SD   9631 QWEST CORPORATION 640      
605-731 5 Sioux Falls SD   9631 QWEST CORPORATION 640      
605-731 6 Sioux Falls SD   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640   2006-09-08   
605-731 7 Sioux Falls SD   9631 QWEST CORPORATION 640      
605-731 8 Sioux Falls SD   162G ONVOY, LLC - SD 640   2011-03-14   
605-731 9 Sioux Falls SD   6569 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 640   2009-07-16   

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

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