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: 241

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-241 A Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-241 0 Lombard IL   224C ONVOY, LLC 358   2018-12-14   
331-241 1 Lombard IL   224C ONVOY, LLC 358   2018-12-14   
331-241 2 Lombard IL   224C ONVOY, LLC 358   2018-12-14   
331-241 3 Lombard IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2019-07-20   
331-241 4 Lombard IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2019-09-26   
331-241 5 Lombard IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2020-01-17   
331-241 6 Lombard IL   224C ONVOY, LLC 358   2020-09-06   
331-241 7 Lombard IL   224C ONVOY, LLC 358   2020-09-06   
331-241 8 Lombard IL   224C ONVOY, LLC 358   2019-07-07   
331-241 9 Lombard IL   224C ONVOY, LLC 358   2019-07-07   

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

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