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: 779

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
815-779 A Plainfield IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2024-03-24   
815-779 0 Plainfield IL   224C ONVOY, LLC 358   2024-04-11   
815-779 1 Plainfield IL   624H ONVOY SPECTRUM, LLC 358   2024-04-28   
815-779 2 Plainfield IL   224C ONVOY, LLC 358   2024-04-26   
815-779 3 Plainfield IL   224C ONVOY, LLC 358   2024-07-29   
815-779 4 Plainfield IL   6529 T-MOBILE USA, INC. 358   2024-09-05   
815-779 5 Plainfield IL   6529 T-MOBILE USA, INC. 358   2024-09-05   
815-779 6 Plainfield IL   6529 T-MOBILE USA, INC. 358   2024-09-05   
815-779 7 Plainfield IL   6529 T-MOBILE USA, INC. 358   2024-03-24   
815-779 8 Plainfield IL   6529 T-MOBILE USA, INC. 358   2024-03-24   
815-779 9 Plainfield IL   6529 T-MOBILE USA, INC. 358   2024-03-24   

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

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