Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 289 [Rate centres in NPA 289] [Dial plan for NPA 289]

NXX: 478

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
289-478 A Port Colborne ON STCTON108MD  4727 ISP TELECOM, INC. 888 805132    

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

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