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: 436

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
224-436 A Lake Forest IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
224-436 0 Lake Forest IL   6529 T-MOBILE USA, INC. 358      
224-436 1 Lake Forest IL   6529 T-MOBILE USA, INC. 358      
224-436 2 Lake Forest IL   6529 T-MOBILE USA, INC. 358      
224-436 3 Lake Forest IL   6529 T-MOBILE USA, INC. 358      
224-436 4 Lake Forest IL   6529 T-MOBILE USA, INC. 358      
224-436 5 Lake Forest IL   6529 T-MOBILE USA, INC. 358   2006-07-23   
224-436 6 Lake Forest IL   6529 T-MOBILE USA, INC. 358   2007-07-13   
224-436 7 Lake Forest IL   6529 T-MOBILE USA, INC. 358   2006-10-11   
224-436 8 Lake Forest IL   516C AT&T CORP. 358   2006-06-30   
224-436 9 Lake Forest IL   6529 T-MOBILE USA, INC. 358      

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

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