What does infinityFree use?

[Greenreader9]

From my guide to Cloudflare:

@Greenreader9

My subdomain doesn’t work with Cloudflare!

Remember, if you got the sub-domain from InfinityFree, it won’t work with Cloudflare.

If you have a custom subdomain (subdomain.yoursite.com):
Create a new “A” record in the DNS section of Cloudflare

CONTENT: the name of the sub-domain, so “help” if the domain is help.yoursite.com
VALUE: the IP address of your main domain (Use set-up step #7 to find this)