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: 823

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
815-823 A Joliet IL   6529 T-MOBILE USA, INC. 358      
815-823 0 Joliet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2025-12-07   
815-823 1 Joliet IL   145J TERRA NOVA TELECOM INC. 358   2025-10-05   
815-823 2 Joliet IL   6529 T-MOBILE USA, INC. 358   2004-03-01   
815-823 3 Joliet IL   6529 T-MOBILE USA, INC. 358   2004-03-01   
815-823 4 Joliet IL   6529 T-MOBILE USA, INC. 358   2004-03-01   
815-823 5 Joliet IL   6529 T-MOBILE USA, INC. 358   2004-03-01   
815-823 6 Joliet IL   5562 METROPCS, INC. 358   2004-07-10   
815-823 7 Joliet IL   5562 METROPCS, INC. 358   2004-07-10   
815-823 8 Joliet IL   460K FIRST COMMUNICATIONS, LLC 358   2004-07-15   
815-823 9 Joliet IL   5562 METROPCS, INC. 358   2005-01-17   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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