dig
DNS Lookup utility.
- Lookup the IP(s) associated with a hostname (A records):
dig +short {{hostname.com}}
- Lookup the mail server associated with a given domain name (MX record):
dig +short {{hostname.com}} MX
- Specify an alternate DNS server to query (8.8.8.8 is google's public DNS):
dig @8.8.8.8 {{hostname.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 {{hostname.com}}