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 0 Omaha NE   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2026-03-15   
531-433 1 Omaha NE   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2026-03-15   
531-433 2 Omaha NE   733J WIRETAP TELECOM, LLC. 644   2025-12-07   
531-433 3 Omaha NE   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2026-03-15   
531-433 4 Omaha NE   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2026-03-15   
531-433 5 Omaha NE   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2026-03-15   
531-433 6 Omaha NE   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2026-03-15   
531-433 7 Omaha NE   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2026-03-15   
531-433 8 Omaha NE   490J BOOST SUBSCRIBERCO L.L.C. 644   2025-12-22   
531-433 9 Omaha NE   490J BOOST SUBSCRIBERCO L.L.C. 644   2026-03-02   

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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