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: 224 [Rate centres in NPA 224] [Dial plan for NPA 224]

NXX: 606

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
224-606 A Wauconda IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2024-05-17   
224-606 0 Wauconda IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2024-05-17   
224-606 1 Wauconda IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-05-20   

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

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