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: 837

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-837 A West Chicago IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358      
331-837 0 West Chicago IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2022-08-19   
331-837 1 West Chicago IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2022-08-19   
331-837 2 West Chicago IL CHCGILMF2MD  6529 T-MOBILE USA, INC. 358   2022-10-24   
331-837 3 West Chicago IL CHCGILMF2MD  6529 T-MOBILE USA, INC. 358   2022-10-24   
331-837 4 West Chicago IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358   2022-03-10   
331-837 7 West Chicago IL   224C ONVOY, LLC 358   2024-03-01   
331-837 8 West Chicago IL CHCGIL24DS6  224C ONVOY, LLC 358   2023-07-22   
331-837 9 West Chicago IL   224C ONVOY, LLC 358   2024-03-01   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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