Local Calling Guide

Area code/prefix search

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NPA: 605 [Rate centres in NPA 605] [Dial plan for NPA 605]

NXX: 733

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-733 A Laplant SD EGBTSDXA964  1647 CHEYENNE RIVER SIOUX TRIBAL TEL. AUTHORITY 640      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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