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: 320

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-320 A Brookings SD   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640   2025-10-03   
605-320 0 Brookings SD   145J TERRA NOVA TELECOM INC. 640   2025-10-11   
605-320 1 Brookings SD   6569 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 640   2026-02-06   
605-320 9 Brookings SD   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640   2025-10-03   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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