Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 431 [Rate centres in NPA 431] [Dial plan for NPA 431]

NXX: 550

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
431-550 A Holland MB WNPJMB061MD  464D FIBERNETICS CORPORATION 888 808809    

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

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