IESO
Tel.: 905-403-6900
Toll-Free: 1-888-448-7777
Fax: 905-403-6921
E-mail: customer.relations@ieso.ca
IESO Reception (Accounts Payable, Human Resources, etc.)
Tel.: 905-855-6100
IESO Media Line (for media inquiries)
Tel.: 416-506-2823
Web Feedback (for comments about this Web site)
Mail:
Independent Electricity System Operator
Attention: (Subject Area)
Station A, Box 4474
Toronto, ON
M5W 4E5
Courier:
Independent Electricity System Operator
Attention: (Subject Area)
655 Bay Street, Suite 410
Toronto, ON
M5G 2K4