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: 309

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-309 A Lemont IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358      
331-309 0 Lemont IL CHCGIL24DS6  224C ONVOY, LLC 358   2023-11-30   
331-309 1 Lemont IL   939H COMMIO, LLC 358   2024-02-03   
331-309 2 Lemont IL   939H COMMIO, LLC 358   2024-02-03   
331-309 3 Lemont IL   939H COMMIO, LLC 358   2024-02-03   
331-309 4 Lemont IL   939H COMMIO, LLC 358   2024-02-03   
331-309 5 Lemont IL   224C ONVOY, LLC 358   2024-03-08   
331-309 6 Lemont IL   224C ONVOY, LLC 358   2024-03-08   
331-309 7 Lemont IL   224C ONVOY, LLC 358   2024-03-08   
331-309 8 Lemont IL   939H COMMIO, LLC 358   2024-02-03   
331-309 9 Lemont IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358   2023-11-29   

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

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