nslookup DNSサーバへ問い合わせ

nslookup IPアドレスorホスト名 [DNSサーバー]

$ nslookup yahoo.com
Server:     aaa.bbb.ccc.ddd
Address:    aaa.bbb.ddd.ddd#53

Non-authoritative answer:
Name:   yahoo.com
Address: 206.190.36.45
Name:   yahoo.com
Address: 98.138.253.109
Name:   yahoo.com
Address: 98.139.183.24

参考： http://webkaru.net/linux/nslookup-command/