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: 644

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
224-644 A Palatine IL   224C ONVOY, LLC 358   2025-05-04   
224-644 0 Palatine IL   224C ONVOY, LLC 358   2025-05-04   
224-644 1 Palatine IL   224C ONVOY, LLC 358   2025-05-04   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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