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: 317

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-317 A Hinsdale IL   939H COMMIO, LLC 358   2024-03-10   
331-317 0 Hinsdale IL   939H COMMIO, LLC 358      
331-317 1 Hinsdale IL   939H COMMIO, LLC 358      
331-317 2 Hinsdale IL   939H COMMIO, LLC 358      
331-317 3 Hinsdale IL   939H COMMIO, LLC 358      
331-317 4 Hinsdale IL   224C ONVOY, LLC 358      
331-317 5 Hinsdale IL   478J NUSO, LLC 358      
331-317 6 Hinsdale IL   478J NUSO, LLC 358      
331-317 7 Hinsdale IL   224C ONVOY, LLC 358      
331-317 8 Hinsdale IL   224C ONVOY, LLC 358      
331-317 9 Hinsdale IL   224C ONVOY, LLC 358      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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