Local Calling Guide

Area code/prefix search

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

NXX: 818

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-818 A Watertown SD NWEFSDXADS1  683C RC COMMUNICATIONS, INC. - SD 640      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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