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: 299

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-299 A Hinsdale IL CHCGILWURMD  965H FRACTEL, LLC 358      
331-299 0 Hinsdale IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2022-09-09   
331-299 1 Hinsdale IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-06-29   
331-299 2 Hinsdale IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-03-05   
331-299 3 Hinsdale IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-03-05   
331-299 4 Hinsdale IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-03-05   
331-299 5 Hinsdale IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-03-05   
331-299 6 Hinsdale IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-03-05   
331-299 7 Hinsdale IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-08-14   
331-299 8 Hinsdale IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2021-03-05   
331-299 9 Hinsdale IL CHCGILWURMD  965H FRACTEL, LLC 358   2021-03-04   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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