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: 252

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-252 A Warrenville IL OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
331-252 0 Warrenville IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2016-07-19   
331-252 1 Warrenville IL CHCGILWUJMD  073H TELNYX LLC 358   2017-04-24   
331-252 3 Warrenville IL CHCGILNEXIX  506J TWILIO INTERNATIONAL, INC. 358   2021-04-13   
331-252 4 Warrenville IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2023-05-08   
331-252 5 Warrenville IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2024-04-13   
331-252 6 Warrenville IL OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2016-07-18   
331-252 7 Warrenville IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358   2022-03-18   
331-252 8 Warrenville IL CHCGIL24XMD  495J STRATUS NETWORKS 358   2020-09-26   
331-252 9 Warrenville IL   224C ONVOY, LLC 358   2024-03-03   

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

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