dnsip 1 user commands djbwares dnsip look up the IP address(es) of a domain name dnsip fqdn dnsip looks up A resource records for fqdn in the Domain Name System and prints the IP address(es) of fqdn on a single line. If fqdn does not exist, dnsip prints a blank line. You can list several fqdns; dnsip prints each result on a separate line. Normally dnsip exits 0. If it encounters a temporary problem that prevents it from determining the list of IP addresses, it prints an error message and exits 111. dnsip makes all DNS lookups using the locally configured DNS proxy server(s), and performs no name qualification on what is taken to already be a "fully-qualified" domain name (trailing dot or no) fqdn. See djbdns-client5 for how this server is found, and for certain standard domain names that short-circuit DNS lookups to the proxy DNS server(s). dnsipq1 a similar tool that also applies name qualification dnsname1 a tool that looks up the domain name(es) of an IP address dnsip was originally part of Daniel J. Bernstein's djbdns toolset in 1999. In the original Bernstein dnsip, the mis-behaviour with stupid consequences and real-world liabilities of the original Bernstein DNS client library would occur. This undocumented behaviour was removed in 2025 and is not present in this version of dnsip. Original code and documentation by Daniel J. Bernstein. Documentation modernizations by Jonathan de Boyne Pollard.