Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 531 [Rate centres in NPA 531] [Dial plan for NPA 531]

NXX: 433

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-433 A Omaha NE   733J WIRETAP TELECOM, LLC. 644   2025-12-07   
531-433 2 Omaha NE   733J WIRETAP TELECOM, LLC. 644   2025-12-07   
531-433 8 Omaha NE   490J DISH WIRELESS, LLC 644   2025-12-22   
531-433 9 Omaha NE   490J DISH WIRELESS, LLC 644   2026-03-02   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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