Wildcard subdomains can be usefull when your domain utilizes a lot of different subdomains, for instance user-generated subdomains.
You may set-up a wildcard subdomain direct with a source like: *.example.com
Note: wildcard subdomains are available from the Basic plan and up.
Note: a wildcard source will be counted as using 10 source hostnames due to the high amount of SSL certificate options. Many different subdomains under a wildcard (100+) are subject to our fair-use policy.
Note: we don't issue wildcard SSL certificates, certificates are installed on first-request basis. This is due to that this would require DNS based domain validation, where the DNS verification token changes on every renewal.