Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 217 [Rate centres in NPA 217] [Dial plan for NPA 217]

NXX: 957

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
217-957 A Mattoon IL MTONILXCVMD  9748 AMERICAN MESSAGING SERVICES, LLC 976      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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