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: 320

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
447-320 A Oakford IL   7421 AT&T - LOCAL 374   2025-09-24   
447-320 0 Oakford IL   145J TERRA NOVA TELECOM INC. 374   2025-10-06   
447-320 9 Oakford IL   7421 AT&T - LOCAL 374   2025-09-24   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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