1. Log in to Cpanel

 2. Search Domains option.

3. Select the Domains option under the “Domains section” in Cpanel

4. Click on Create a new Domain option.

5. Enter the *.domainname.com in the “Enter the domain that you would like to create” option as you wish to create the wildcard domain

6. After that mention the document path for the domain in “Document Root ”

7. Click on submit button.