/registration/whitelist is no longer available.
User verification is done in a different manner during the signup process now. As a result, the registration allowlisting page is no longer supported.
If you are willing, we'd like to know how you got here. If you could click on the 'contact support' link below, then click 'Can't Log in?', then click 'Create an IBM Cloud Service Request', we can try to determine what went wrong and try to help you complete your signup task.