Local Calling Guide

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NPA: 274 [Rate centres in NPA 274] [Dial plan for NPA 274]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
274-999 9 Casco WI   225C ONVOY, LLC - WI 350   2025-10-18   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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