dnsutils

Clients provided with BIND
The Berkeley Internet Name Domain (BIND) implements an Internet domain
name server. BIND is the most widely-used name server software on the
Internet, and is supported by the Internet Software Consortium, www.isc.org.
This package delivers various client programs related to DNS that are
derived from the BIND source tree.
.
- dig - query the DNS in various ways
- nslookup - the older way to do it
- nsupdate - perform dynamic updates (See RFC2136)