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: 623

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
224-623 A Algonquin IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
224-623 0 Algonquin IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-01-05   
224-623 1 Algonquin IL   6529 T-MOBILE USA, INC. 358      
224-623 2 Algonquin IL   6529 T-MOBILE USA, INC. 358      
224-623 3 Algonquin IL   6529 T-MOBILE USA, INC. 358      
224-623 4 Algonquin IL   6529 T-MOBILE USA, INC. 358      
224-623 5 Algonquin IL   6529 T-MOBILE USA, INC. 358      
224-623 6 Algonquin IL   460K FIRST COMMUNICATIONS, LLC 358   2004-12-02   
224-623 7 Algonquin IL   6529 T-MOBILE USA, INC. 358   2007-09-25   
224-623 8 Algonquin IL   829J PAETEC ITEL, LLC 358   2006-05-28   
224-623 9 Algonquin IL   6529 T-MOBILE USA, INC. 358      

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

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