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Scheduled System Maintenance June 21st, 2018

Attention Users

Scheduled System Maintenance


Begining 8:00 PM (EST) Thursday, June 21st, 2018 until 4:00 AM Friday, June, 22nd; Ontario One Call will be performing maintenance on its information technology systems.


During this time we will only accept emergency locate requests via telephone and dispatch via a manual process.

Call 1-800-400-2255

The following services will not be available during the maintenance window.

– Web Portal

– Contractor Bridge

360 feedback (TCP/IP and Webservice)

– Corporate Website

– Maps on the web

– Subscriptions on the web

– Ontario One Calls Mailing list



Ontario One Call