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: 323

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
447-323 A Milton IL   7421 AT&T - LOCAL 376   2025-09-25   
447-323 9 Milton IL   7421 AT&T - LOCAL 376   2025-09-25   

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

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