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: 371

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
224-371 A Grayslake IL CHCGIL24DS6  224C ONVOY, LLC 358      
224-371 0 Grayslake IL   073H TELNYX LLC 358   2021-03-25   
224-371 1 Grayslake IL   224C ONVOY, LLC 358   2021-04-01   
224-371 2 Grayslake IL   224C ONVOY, LLC 358   2021-04-01   
224-371 3 Grayslake IL   224C ONVOY, LLC 358   2021-04-01   
224-371 4 Grayslake IL   224C ONVOY, LLC 358   2021-04-01   
224-371 5 Grayslake IL   224C ONVOY, LLC 358   2024-08-14   
224-371 6 Grayslake IL   224C ONVOY, LLC 358   2023-07-22   
224-371 7 Grayslake IL   224C ONVOY, LLC 358   2021-03-06   
224-371 8 Grayslake IL   224C ONVOY, LLC 358   2021-03-06   
224-371 9 Grayslake IL   515J IP HORIZON LLC 358   2021-06-25   

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

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