Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 417 [Rate centres in NPA 417] [Dial plan for NPA 417]

NXX: 584

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
417-584 A Springfield MO   128L E. RITTER COMMUNICATIONS, LLC 522   2026-02-19   
417-584 1 Springfield MO   128L E. RITTER COMMUNICATIONS, LLC 522   2026-02-19   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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