Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 331 [Rate centres in NPA 331] [Dial plan for NPA 331]

NXX: 323

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-323 A Glen Ellyn IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-04-12   
331-323 0 Glen Ellyn IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-04-12   
331-323 1 Glen Ellyn IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-04-12   
331-323 8 Glen Ellyn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2024-11-11   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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