dig

DNS lookup utility. More information: https://manned.org/dig.

• Lookup the IP(s) associated with a hostname (A records):

dig +short {{example.com}}

• Get a detailed answer for a given domain (A records):

dig +noall +answer {{example.com}}

• Query a specific DNS record type associated with a given domain name:

dig +short {{example.com}} {{A|MX|TXT|CNAME|NS}}

• Specify an alternate DNS server to query and optionally use DNS over TLS (DoT):

dig {{+tls}} @{{1.1.1.1|8.8.8.8|9.9.9.9|...}} {{example.com}}

• Perform a reverse DNS lookup on an IP address (PTR record):

dig -x {{8.8.8.8}}

• Find authoritative name servers for the zone and display SOA records:

dig +nssearch {{example.com}}

• Perform iterative queries and display the entire trace path to resolve a domain name:

dig +trace {{example.com}}

• Query a DNS server over a non-standard [p]ort using the TCP protocol:

dig +tcp -p {{port}} @{{dns_server_ip}} {{example.com}}