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: 217 [Rate centres in NPA 217] [Dial plan for NPA 217]

NXX: 875

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
217-875 A Decatur IL DCTRILDNDS0  9329 ILLINOIS BELL TEL CO 374      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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