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: 577

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
224-577 A Round Lake IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
224-577 0 Round Lake IL   224C ONVOY, LLC 358   2004-09-20   
224-577 1 Round Lake IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2011-11-12   
224-577 2 Round Lake IL   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2012-05-17   
224-577 3 Round Lake IL   6529 T-MOBILE USA, INC. 358   2017-12-21   
224-577 4 Round Lake IL   829J PAETEC ITEL, LLC 358   2011-12-13   
224-577 5 Round Lake IL   6529 T-MOBILE USA, INC. 358      
224-577 6 Round Lake IL   6529 T-MOBILE USA, INC. 358      
224-577 7 Round Lake IL   6529 T-MOBILE USA, INC. 358      
224-577 8 Round Lake IL   6529 T-MOBILE USA, INC. 358      
224-577 9 Round Lake IL   6529 T-MOBILE USA, INC. 358      

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

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