A cloudflade record needs your site's IPv4 to transfer a domain

[ChrisPAR]

Adding your domain via an A record is not supported. You can use CNAME verification instead:

How to add your domain with CNAME verification

If you want to host your own domain name with InfinityFree, the default way to verify your domain is to set the nameservers first. However, there are cases where setting the nameservers ahead of time is not desirable (for example if you have an existing site which cannot go down) or if your domain provider does not let you set our nameservers. Fortunately, InfinityFree now has the ability to host your domain name with us without having to change your nameservers ahead of time! This guide explai…