Local Calling Guide

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NPA: 773 [Rate centres in NPA 773] [Dial plan for NPA 773]

NXX: 599

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-599 A Chicago Zone 08-Portsmouth IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-12-29   
773-599 0 Chicago Zone 08-Portsmouth IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-12   
773-599 1 Chicago Zone 08-Portsmouth IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-12   
773-599 2 Chicago Zone 08-Portsmouth IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-12   
773-599 3 Chicago Zone 08-Portsmouth IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-12   
773-599 4 Chicago Zone 08-Portsmouth IL CHCGIL24DS6  224C ONVOY, LLC 358   2008-08-31   
773-599 5 Chicago Zone 08-Portsmouth IL CHCGILCNHMD  073H TELNYX LLC 358   2023-01-02   
773-599 6 Chicago Zone 08-Portsmouth IL   224C ONVOY, LLC 358   2025-11-08   
773-599 7 Chicago Zone 08-Portsmouth IL   224C ONVOY, LLC 358   2025-11-08   
773-599 8 Chicago Zone 08-Portsmouth IL CHCGIL24DS6  224C ONVOY, LLC 358   2008-08-31   
773-599 9 Chicago Zone 08-Portsmouth IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-12   

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

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