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: 226

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
274-226 A Oakfield WI   6274 UNITED STATES CELLULAR - WI 356   2025-05-15   
274-226 0 Oakfield WI   6274 UNITED STATES CELLULAR - WI 356   2025-05-15   
274-226 1 Oakfield WI   6274 UNITED STATES CELLULAR - WI 356   2025-05-15   
274-226 2 Oakfield WI   6274 UNITED STATES CELLULAR - WI 356   2025-05-15   
274-226 3 Oakfield WI   6274 UNITED STATES CELLULAR - WI 356   2025-05-15   
274-226 4 Oakfield WI   6274 UNITED STATES CELLULAR - WI 356   2025-05-15   
274-226 6 Oakfield WI   145J TERRA NOVA TELECOM INC. 356   2025-08-21   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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