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machineine$ host -t ns example.com example.com name server ns1.example.com example.com name server ns2.example.com machine$ host -l example.com ns1.example.com example.com name server ns1.example.com example.com name server ns2.example.com www.example.com has address 172.26.105.20 mailhost.example.com has address 172.26.105.31 mailbackup.example.com has address 172.26.105.20 172-26-105-31.example.com domain name pointer mailhost.example.com db.example.com has address 172.26.105.21 anonftp.example.com has address 172.26.105.22