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: 666

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
274-666 A Collins WI   225C ONVOY, LLC - WI 356   2026-02-17   
274-666 6 Collins WI   225C ONVOY, LLC - WI 356   2026-02-17   
274-666 7 Collins WI   225C ONVOY, LLC - WI 356   2026-02-17   
274-666 8 Collins WI   225C ONVOY, LLC - WI 356   2026-02-17   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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