By hosting your domains at oNet.nu you get full control of your own domain's DNS settings. That means you are free to easily alter the "WHOIS" information (ownership, e-mail contacts etc.), change name servers or create custom A (IP address) and MX (Mail Exchange) records for your domains.
We also offer registration of child DNSes, which let you use name servers similar to "ns1.mydomain.com" and "ns2.mydomain.com".