Local Calling Guide

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

NXX: 544

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
224-544 A Lake Forest IL LKFRILLFRP0  9329 ILLINOIS BELL TEL CO 358      
224-544 0 Lake Forest IL   6529 T-MOBILE USA, INC. 358   2008-05-06   
224-544 1 Lake Forest IL   224C ONVOY, LLC 358   2009-04-26   
224-544 2 Lake Forest IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2021-03-12   
224-544 3 Lake Forest IL   515J IP HORIZON LLC 358   2023-07-07   
224-544 4 Lake Forest IL   9329 ILLINOIS BELL TEL CO 358   2007-04-27   
224-544 5 Lake Forest IL   318J COMCAST IP PHONE, LLC 358   2008-04-01   
224-544 6 Lake Forest IL   9329 ILLINOIS BELL TEL CO 358   2007-04-27   
224-544 7 Lake Forest IL   9329 ILLINOIS BELL TEL CO 358   2007-08-02   
224-544 8 Lake Forest IL   829J PAETEC ITEL, LLC 358   2009-11-12   
224-544 9 Lake Forest IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   

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

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