简单办法查询DNS服务器的域名及IP地址
进入DOS，输入nslookup,
>nslookup
> set querytype=ns
> tom
Server: UnKnown
Address: 192.168.18.1

Non-authoritative answer:
tom nameserver = ns2.tom
tom nameserver = ns1.tom

ns1.tom internet address = 61.135.159.46
ns2.tom internet address = 61.135.159.47
>

set querytype=ns 设置查询类型为查询NAME SERVER
tom 换成你想查询DNS服务器的域名
回车后即可得到DNS服务器的域名及IP地址。