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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OCN: 1009 C-R TELEPHONE CO.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
815-358 A Cornell IL CRNLILXADS0  366      
815-586 A Ransom IL RNSMILXARS0  366      

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

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