Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 815 [Rate centres in NPA 815] [Dial plan for NPA 815]

NXX: 657

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
815-657 A Forrest (Livingston) IL FRSTILFODS0  9329 ILLINOIS BELL TEL CO 366      
815-657 0 Forrest (Livingston) IL   9329 ILLINOIS BELL TEL CO 366      
815-657 1 Forrest (Livingston) IL   224C ONVOY, LLC 366   2019-07-15   
815-657 2 Forrest (Livingston) IL   224C ONVOY, LLC 366   2019-01-17   
815-657 4 Forrest (Livingston) IL   073H TELNYX LLC 366   2020-07-09   
815-657 5 Forrest (Livingston) IL   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 366   2010-03-15   
815-657 7 Forrest (Livingston) IL   9329 ILLINOIS BELL TEL CO 366      
815-657 8 Forrest (Livingston) IL   9329 ILLINOIS BELL TEL CO 366      
815-657 9 Forrest (Livingston) IL   224C ONVOY, LLC 366   2019-07-15   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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