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: 426

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-426 A Lemont IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358      
331-426 0 Lemont IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2022-10-01   
331-426 1 Lemont IL   224C ONVOY, LLC 358   2023-08-12   
331-426 2 Lemont IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2022-07-05   
331-426 3 Lemont IL   516J TON80 COMMUNICATIONS, LLC 358   2022-04-22   
331-426 4 Lemont IL   224C ONVOY, LLC 358   2023-08-12   
331-426 5 Lemont IL   224C ONVOY, LLC 358   2023-08-12   
331-426 6 Lemont IL   224C ONVOY, LLC 358   2023-08-12   
331-426 7 Lemont IL   224C ONVOY, LLC 358   2023-08-12   
331-426 8 Lemont IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2022-11-17   
331-426 9 Lemont IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2022-11-17   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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