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: 417 [Rate centres in NPA 417] [Dial plan for NPA 417]

NXX: 378

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
417-378 A Neosho MO SPFDMOTLXQY  624H ONVOY SPECTRUM, LLC 522   2024-05-02   
417-378 0 Neosho MO SPFDMOTLXQY  624H ONVOY SPECTRUM, LLC 522   2024-05-02   
417-378 1 Neosho MO SPFDMOPYAMD  5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 522   2025-02-14   
417-378 7 Neosho MO   114J EXIANT COMMUNICATIONS LLC 522   2026-10-16   
417-378 8 Neosho MO   093F ONVOY, LLC - MO 522   2026-10-08   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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