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: 679

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
815-679 A McHenry IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
815-679 3 McHenry IL   8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
815-679 4 McHenry IL   460K FIRST COMMUNICATIONS, LLC 358   2010-09-23   
815-679 6 McHenry IL   318J COMCAST IP PHONE, LLC 358   2006-12-31   
815-679 7 McHenry IL   5562 METROPCS, INC. 358   2008-02-15   
815-679 8 McHenry IL   6529 T-MOBILE USA, INC. 358   2006-06-23   
815-679 9 McHenry IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-04-27   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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