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 port using the TCP protocol:
dig +tcp -p port @dns_server_ip example.com