Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 309 [Rate centres in NPA 309] [Dial plan for NPA 309]

NXX: 815

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-815 A Stanford IL BLTNILXDXMX  224C ONVOY, LLC 366      
309-815 2 Stanford IL BLTNILXDXMX  224C ONVOY, LLC 366   2023-08-26   
309-815 5 Stanford IL BLTNILATX5X  197D VONAGE AMERICA LLC 366   2024-05-30   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

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