Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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South Ladd, SD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
605-576 A DCSNNDASDS0  1607 CONSOLIDATED TELCOM 638      

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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