You can register .ro domains and every Romanian extension (.com.ro, .info.ro, .org.ro, .store.ro and more), plus international ones such as .com, .net, .org, .e...
Public A and AAAA records reveal the IP addresses you direct visitors to. You cannot make those records private while keeping them available for people to look up and access your website. A CNAME record does not automatically hide the server either: its destination can be followed through DNS.
A reverse proxy or CDN can expose its own addresses instead of your origin server’s address, but it requires a compatible setup. Email records, historical DNS data or other services may still reveal the origin address. If your aim is to protect the server, review access restrictions as well as DNS settings.