To associate a hostname with a SimpleCDN bucket using CNAMEs:
Select a hostname that belongs to a domain you control. This example uses the cdn subdomain of the cowfacts.com domain.
Create a bucket that matches the hostname.
Bucket Name: cdn.cowfacts.com
Your bucket name must exactly match the hostname you plan to use.
Create a CNAME record that defines the hostname as an alias for the SimpleCDN bucket.
DNS Record:
cdn.cowfacts.com CNAME cdn.cowfacts.com.simplecdn.net