Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 519 [Rate centres in NPA 519] [Dial plan for NPA 519]

NXX: 704

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
519-704 A Sarnia ON SARNON304MD  4727 ISP TELECOM, INC. 888 805128    

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

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