Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 464 [Rate centres in NPA 464] [Dial plan for NPA 464]

NXX: 256

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
464-256 A Chicago Heights IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2025-03-13   
464-256 0 Chicago Heights IL   224C ONVOY, LLC 358   2025-03-14   
464-256 1 Chicago Heights IL   224C ONVOY, LLC 358   2025-03-14   
464-256 2 Chicago Heights IL   490J DISH WIRELESS, LLC 358   2025-09-07   
464-256 5 Chicago Heights IL   490J DISH WIRELESS, LLC 358   2025-12-05   
464-256 6 Chicago Heights IL   490J DISH WIRELESS, LLC 358   2026-02-03   
464-256 8 Chicago Heights IL   224C ONVOY, LLC 358   2025-03-14   
464-256 9 Chicago Heights IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2025-03-13   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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