Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 447 [Rate centres in NPA 447] [Dial plan for NPA 447]

NXX: 321

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
447-321 A Fairmount IL   7421 AT&T - LOCAL 370   2025-09-24   
447-321 9 Fairmount IL   7421 AT&T - LOCAL 370   2025-09-24   

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

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