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: 297

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-297 A Geneva IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-297 0 Geneva IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-03-01   
331-297 1 Geneva IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-03-01   
331-297 2 Geneva IL CHCGIL24DS6  224C ONVOY, LLC 358   2023-10-12   
331-297 3 Geneva IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2024-04-19   
331-297 8 Geneva IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-04-04   
331-297 9 Geneva IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-04-04   

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

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