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: 217

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-217 A Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-217 0 Lombard IL   624H ONVOY SPECTRUM, LLC 358   2024-05-06   
331-217 2 Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358   2023-09-10   
331-217 3 Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358   2023-09-10   
331-217 4 Lombard IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2024-02-18   
331-217 5 Lombard IL   939H COMMIO, LLC 358   2024-02-03   
331-217 6 Lombard IL   939H COMMIO, LLC 358   2024-02-03   
331-217 7 Lombard IL   939H COMMIO, LLC 358   2024-02-03   
331-217 8 Lombard IL   939H COMMIO, LLC 358   2024-02-03   
331-217 9 Lombard IL CHCGILMF2MD  6529 T-MOBILE USA, INC. 358   2023-10-25   

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

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