First steps into Cloudflare https://danielmuller.me/2012/12/first-steps-into-cloudflare/
- Host DNS at Cloudflare
Does Cloudflare support wildcard DNS entries?
Cloudflare supports the wildcard '*' record for DNS management in all customer plans.
- Enterprise customers get full proxy support for wildcard records.
Free, Pro and Business plans
Cloudflare does not proxy wildcard records;
- therefore, wildcard subdomains are served directly without any Cloudflare performance, security, or apps. As a result, Wildcard domains get no cloud (orange or grey) in the Cloudflare DNS app.
If you are adding a * CNAME or A Record, you need to make sure the record is grey clouded in order for the record to be created.
Understanding Subdomain Support https://support.cloudflare.com/hc/en-us/articles/360026440252-Understanding-Subdomain-Support
Subdomain Support is only available to Enterprise customers and is enabled by default.