Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 224 [Rate centres in NPA 224] [Dial plan for NPA 224]

NXX: 392

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
224-392 A Northbrook IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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