Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 872 [Rate centres in NPA 872] [Dial plan for NPA 872]

NXX: 392

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
872-392 A Chicago Zone 08-Portsmouth IL   224C ONVOY, LLC 358   2026-03-20   
872-392 0 Chicago Zone 08-Portsmouth IL   224C ONVOY, LLC 358   2026-03-20   

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

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