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: 557

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
224-557 A Palatine IL CHCGILWUKMD  939H COMMIO, LLC 358   2024-03-14   
224-557 0 Palatine IL CHCGILWUKMD  939H COMMIO, LLC 358   2024-03-14   
224-557 1 Palatine IL CHCGILWUKMD  939H COMMIO, LLC 358   2024-03-14   
224-557 2 Palatine IL CHCGILWUKMD  939H COMMIO, LLC 358   2024-03-14   
224-557 3 Palatine IL CHCGILWUKMD  939H COMMIO, LLC 358   2024-03-14   
224-557 4 Palatine IL CHCGILWUKMD  939H COMMIO, LLC 358   2024-03-14   
224-557 5 Palatine IL   224C ONVOY, LLC 358   2025-03-08   
224-557 6 Palatine IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-07-29   
224-557 7 Palatine IL   224C ONVOY, LLC 358   2025-09-07   
224-557 8 Palatine IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-06-30   
224-557 9 Palatine IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-07-29   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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