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: 288

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-288 A Madison NE OMAHNENWGT6  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644      
531-288 6 Madison NE OMAHNENWXEX  7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644   2023-02-20   
531-288 7 Madison NE OMAHNENWGT6  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2024-11-10   
531-288 8 Madison NE OMAHNENWGT6  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2024-04-20   
531-288 9 Madison NE OMAHNENWGT6  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644   2022-09-18   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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