Customer Service/Help Desk:
Toll free: 1-877-860-1411
Fax: 1-800-285-0517
Monday to Friday, 8:00 am to 8:00 pm (Eastern)

Mailing Address:
Canadian Internet Registration Authority (CIRA)
350 Sparks Street, Suite 306
Ottawa, Ontario, K1R 7S8
Administration: 613-237-5335
Monday to Friday, 8:30 am to 4:30 pm (Eastern)