$ nslookup Default Server: virgo.jcu.cz Address: 160.217.1.10 > set type=NS > server ns.eunet.cz Default Server: ns.eunet.cz Address: 193.85.1.12 > debian.cz Server: ns.eunet.cz Address: 193.85.1.12 *** ns.eunet.cz can't find debian.cz: Non-existent host/domain > Proc? Karel