Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Center, SD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
605-247 A SALMSDXADS3  1669 TRIOTEL COMMUNICATIONS, INC. 640      

Last updated: Tue, 07 Oct 2025 16:47:53 UTC

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