I'm on a Mac using Terminal, so I'm not sure about that last command, but this is what I get:
WV-MacPro-2:~ mitchandbev$ nslookup
www.canreef.com
Server: 64.71.255.253
Address: 64.71.255.253#53
Non-authoritative answer:
Name:
www.canreef.com
Address: 96.31.86.198
WV-MacPro-2:~ mitchandbev$ nslookup mail.canreef.com
Server: 64.71.255.253
Address: 64.71.255.253#53
Name: mail.canreef.com
Address: 96.31.86.198
WV-MacPro-2:~ mitchandbev$ nslookup ns1.canreef.com
Server: 64.71.255.198
Address: 64.71.255.198#53
Non-authoritative answer:
Name: ns1.canreef.com
Address: 96.31.86.200
WV-MacPro-2:~ mitchandbev$ nslookup ns2.canreef.com
Server: 64.71.255.198
Address: 64.71.255.198#53
Non-authoritative answer:
Name: ns2.canreef.com
Address: 96.31.86.201
WV-MacPro-2:~ mitchandbev$ ipconfig /flushdns
usage: ipconfig <command> <args>
where <command> is one of waitall, getifaddr, ifcount, getoption, getpacket, set, setverbose