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: 504

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
289-504 A Newmarket ON NWMKON85IMD  3147 EXATEL, INC. 888 805145    

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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