Local Calling Guide

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NPA: 331 [Rate centres in NPA 331] [Dial plan for NPA 331]

NXX: 264

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-264 A Hinsdale IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
331-264 0 Hinsdale IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2020-04-28   
331-264 1 Hinsdale IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2020-04-27   
331-264 2 Hinsdale IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2020-04-28   
331-264 3 Hinsdale IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2020-04-28   
331-264 4 Hinsdale IL CHCGIL24DS6  224C ONVOY, LLC 358   2020-09-06   
331-264 5 Hinsdale IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2020-06-27   
331-264 6 Hinsdale IL CHCGIL24DS6  224C ONVOY, LLC 358   2020-09-06   
331-264 7 Hinsdale IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2020-09-14   
331-264 8 Hinsdale IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2020-09-27   
331-264 9 Hinsdale IL CHCGIL24XMD  495J STRATUS NETWORKS 358   2020-10-10   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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