Local Calling Guide

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

NXX: 303

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-303 A Elburn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
331-303 0 Elburn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-03-14   
331-303 2 Elburn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-03-14   
331-303 3 Elburn IL CHCGIL24DS6  224C ONVOY, LLC 358   2014-09-15   
331-303 4 Elburn IL CHCGIL24DS6  224C ONVOY, LLC 358   2014-09-15   
331-303 5 Elburn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-05-16   
331-303 6 Elburn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-05-16   
331-303 7 Elburn IL CHCGILDT8MD  508J CENTURYLINK COMMUNICATIONS, LLC 358   2014-07-15   
331-303 8 Elburn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-05-16   
331-303 9 Elburn IL CHCGILWUJMD  073H TELNYX LLC 358   2018-06-28   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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