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: 474

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
417-474 A Richards MO SPFDMODL5MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 522   2024-05-21   
417-474 4 Richards MO   145J TERRA NOVA TELECOM INC. 522   2025-07-12   
417-474 7 Richards MO SPFDMODL5MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 522   2024-05-21   

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

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