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: 573

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
289-573 A Oak Ridges ON RMHLON34CMD  464D FIBERNETICS CORPORATION 888 805145    

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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