Nslookup

nslookup is a program used to manually query DNS servers.

An example query: $ nslookup -sil wiki.linuxquestions.org Server:        192.168.1.1 Address:       192.168.1.1#53 Non-authoritative answer: Name:  wiki.linuxquestions.org Address: 209.152.163.16

Server and Answer describe the server asked. Name is the host we have asked about and Address is its IP address

Note that I have used the -sil flag, because it supresses the message that nslookup is obsolete.

= See also =
 * dig is a similar program.
 * host gives you the hostnames assigned to an IP (reverse direction)