host—prints information about specified hosts or zones in DNS

host [l]  [-v]  [-w]  [-r]  [-d]  [-t querytype]  [a]  host [server]

The host command prints information about specified Internet hosts. It gets its information from a set of interconnected servers spread across the country. By default, it converts between hostnames and IP addresses. With the -a or -t switch, all information is printed.