Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 274 [Rate centres in NPA 274] [Dial plan for NPA 274]

NXX: 999

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
274-999 A Casco WI   225C ONVOY, LLC - WI 350   2025-10-18   
274-999 0 Casco WI   225C ONVOY, LLC - WI 350   2025-10-18   
274-999 9 Casco WI   225C ONVOY, LLC - WI 350   2025-10-18   

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

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