Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 331 [Rate centres in NPA 331] [Dial plan for NPA 331]

NXX: 825

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-825 A Geneva IL   972C DIGITAL NETWORK ACCESS COMMUNICATIONS, INC. - IL 358      

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

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