[bartekrutkowski]

If I'm not mistaken, it is possible, but not on the free tier.

[paulgb]

I don’t think it’s the case even on a paid tier, if it is I can’t find any reference to it. There are a lot of posts on their community support form where the recommendation is to use another registrar. https://community.cloudflare.com/t/use-cloudflare-registrar-...

[remram]

I do see an option for custom nameservers on my dashboard, followed by a button "upgrade to business".