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: 531 [Rate centres in NPA 531] [Dial plan for NPA 531]

NXX: 412

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-412 A Humboldt NE   6263 UNITED STATES CELLULAR - NE 958   2025-07-19   
531-412 0 Humboldt NE   6263 UNITED STATES CELLULAR - NE 958   2025-07-19   
531-412 1 Humboldt NE   6263 UNITED STATES CELLULAR - NE 958   2025-07-19   
531-412 2 Humboldt NE   6263 UNITED STATES CELLULAR - NE 958   2025-07-19   
531-412 3 Humboldt NE   6263 UNITED STATES CELLULAR - NE 958   2025-07-19   
531-412 4 Humboldt NE   6263 UNITED STATES CELLULAR - NE 958   2025-07-19   
531-412 5 Humboldt NE   6263 UNITED STATES CELLULAR - NE 958   2025-07-19   
531-412 6 Humboldt NE   6263 UNITED STATES CELLULAR - NE 958   2025-07-19   
531-412 7 Humboldt NE   6263 UNITED STATES CELLULAR - NE 958   2025-07-19   
531-412 8 Humboldt NE   6263 UNITED STATES CELLULAR - NE 958   2025-07-19   
531-412 9 Humboldt NE   6263 UNITED STATES CELLULAR - NE 958   2025-07-19   

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

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