Technically they won’t. They won’t host OpenNIC TLDs, for example. However, you can have your domain registered with any registrar, and as long as you specify Cloudflare’s assigned DNS servers for your domain (DNSSEC records can be set too), you should be OK.
Technically they won’t. They won’t host OpenNIC TLDs, for example. However, you can have your domain registered with any registrar, and as long as you specify Cloudflare’s assigned DNS servers for your domain (DNSSEC records can be set too), you should be OK.