Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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OCN: 1660 FORT RANDALL TELCO DBA MT RUSHMORE TELEPHONE CO

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
605-255 A Hermosa SD HRMSSDXARS1  640      
605-326 A Viborg SD VBRGSDXARS1  640      
605-384 A Wagner SD WGNRSDXADS0  640      
605-463 A Tabor SD TABRSDXARS1  640      
605-487 A Lake Andes SD LKANSDXARS1  640      
605-563 A Centerville SD CNVLSDXARS1  640      
605-589 A Tyndall SD TYNDSDXARS1  640      
605-666 A Keystone SD KYSTSDXADS1  640      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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