CNAME and virtual host changes require assistance from the Apigee Support team. This post provides details on what information is needed to make these changes. The Support team can also provide the IP addresses to use for whitelisting if you need them for your implementation. For security purposes, this information is not posted on the Community site.
Apigee Developer (free) users should contact Support using the following url: https://pages.apigee.com/request-support-general.html
Apigee Edge (paid) users should contact Support using their Support Portal account at http://apigee.com/about/support/portal
Now that the free support portal has been turned off, does that mean virtual host changes are no longer available to free users?