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: 574

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
224-574 A Skokie IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-03-29   
224-574 0 Skokie IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-03-29   
224-574 1 Skokie IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-03-29   
224-574 2 Skokie IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-03-29   
224-574 3 Skokie IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-03-29   
224-574 4 Skokie IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-03-29   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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