Dig (command)

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dig

Original author(s)	Steve Hotz, Michael Sawyer
Developer(s)	Internet Systems Consortium (originally Computer Systems Research Group)
Operating system	Linux, NetBSD, FreeBSD, OpenBSD, macOS, Windows, Solaris, illumos, OpenVMS
Type	DNS lookup tool
License	Mozilla Public License (ISC license before 9.11[1])
Website	https://www.isc.org/bind/

dig is a network administration command-line tool for querying the Domain Name System (DNS).

dig is useful for network troubleshooting and for educational purposes.^[2] It can operate based on command line option and flag arguments, or in batch mode by reading requests from an operating system file. When a specific name server is not specified in the command invocation, it uses the operating system's default resolver, usually configured in the file resolv.conf. Without any arguments it queries the DNS root zone.

dig supports Internationalized domain name (IDN) queries.

dig is a component of the domain name server software suite BIND. dig supersedes in functionality older tools, such as nslookup and the program host; however, the older tools are still used in complementary fashion.