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: 597

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-597 A Mitchell SD MTCHSDCORS1  9631 QWEST CORPORATION 640      
605-597 0 Mitchell SD   6569 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 640   2021-04-15   
605-597 1 Mitchell SD   6569 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 640   2023-08-30   
605-597 2 Mitchell SD   624H ONVOY SPECTRUM, LLC 640   2024-12-20   
605-597 3 Mitchell SD   162G ONVOY, LLC - SD 640   2021-07-08   
605-597 4 Mitchell SD   162G ONVOY, LLC - SD 640   2020-12-07   
605-597 5 Mitchell SD   162G ONVOY, LLC - SD 640   2020-12-07   
605-597 6 Mitchell SD   508J CENTURYLINK COMMUNICATIONS, LLC 640   2017-06-03   
605-597 7 Mitchell SD   162G ONVOY, LLC - SD 640   2012-01-30   
605-597 8 Mitchell SD   162G ONVOY, LLC - SD 640   2021-07-08   
605-597 9 Mitchell SD   9631 QWEST CORPORATION 640   2010-09-10   

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

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