In Unix, how can I find out the domain name associated with an IP number?

To find the domain name associated with an IP number, use the nslookup command. At the Unix shell prompt, enter nslookup followed by the IP address, for example:

This command will return the following information:

You can also specify a hostname on the command line to find out its IP number.

You can use the nslookup command interactively. For more information, at the Unix shell prompt, enter:

At Indiana University, to get support for personal or departmental Linux or Unix systems, see At IU, how do I get support for Linux or Unix?

Also see:

• In Unix, how do I look up IP addresses?