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...
Yes, you can delegate DNS management for a subdomain using NS records. One provider can manage your main domain’s DNS zone while another manages a subdomain’s zone, such as app.example.ro. This differs from simply pointing the subdomain to an IP address: delegation determines which nameservers answer DNS queries for that zone.
First, set up the subdomain’s zone with the new provider and add the records it needs. Then add NS records for the subdomain in your main domain’s DNS zone, using the nameservers supplied. Check for conflicting existing records and test the delegation. You do not need to change the nameservers for the entire domain.