Can I create and use multiple CNAMEs for an HTTP pull zone?

Yes, you can create multiple CNAMEs(maximum of  3) for your HTTP pull zone but you can only enable SSL for a Cname.  The first step is to verify the root domains. You can refer to this link for the domain verification.

How to verify my domain?

• You need to create Cname and point the CNAME to our hostname. For example, if your CNAME is cdn.yourdomain.com then you need to point it to push-xxx.5centsCDN.com.
• Add all Cname in the console.

1. Login to 5centsCDN console.
2. Go to Zones and select HTTP Pull.
3. Click the Manage button of your pull zone.
4. On the redirected page, click the CDN Resource option.
5. Add your CNAMEs under Custom CNAMES.  You can add a maximum of 3 CNAMEs.
   
6. Click the Save button.
7. Scroll down the page and click the SSL option.
8. Enable the option and select SSL type as Let’s Encrypt SSL or Custom SSL.
9. Select the appropriate CNAME from the list.

NB: You can only enable SSL(HTTPS) for a CNAME. Also, you can use other CNAME in HTTP.