Hi Aaron, we can't provide such information, as the real owner of this phone number might not even be calling you (a practice called "spoofing", see this link: http://koo.do/1JfnBQJ). There is not much that can be done. In case of harassment, you should contact your local police and file a complaint. You could also change your phone number. If you are a Koodo customer, you can easily change it online via Self Serve, free of charge. Thank you!