Local Calling Guide

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Search area code/prefix (NPA/NXX)
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NPA: 779 [Rate centres in NPA 779] [Dial plan for NPA 779]

NXX: 456

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
779-456 A Joliet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
779-456 0 Joliet IL   6529 T-MOBILE USA, INC. 358   2008-09-02   
779-456 1 Joliet IL   6529 T-MOBILE USA, INC. 358   2009-03-14   
779-456 2 Joliet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2010-09-17   
779-456 3 Joliet IL   6529 T-MOBILE USA, INC. 358   2011-06-17   
779-456 4 Joliet IL   224C ONVOY, LLC 358   2013-12-19   
779-456 5 Joliet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2012-05-16   
779-456 6 Joliet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-07-02   
779-456 7 Joliet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2024-12-17   
779-456 8 Joliet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2025-01-08   
779-456 9 Joliet IL   6529 T-MOBILE USA, INC. 358   2008-02-23   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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