Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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NPA: 274 [Rate centres in NPA 274] [Dial plan for NPA 274]

NXX: 333

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
274-333 A Random Lake WI   225C ONVOY, LLC - WI 356   2026-02-17   
274-333 3 Random Lake WI   225C ONVOY, LLC - WI 356   2026-02-17   
274-333 4 Random Lake WI   225C ONVOY, LLC - WI 356   2026-02-17   
274-333 5 Random Lake WI   225C ONVOY, LLC - WI 356   2026-02-17   

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

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