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tldr/pages/common/dig.md
George D. Plymale II dff8f92cf0 dig.md: add reverse DNS lookup example (#1003) 
Doing a reverse DNS lookup by typing out the IP address in reverse, plus adding .in-addr.arpa to the end is tedious, but fortunately dig has the -x option which makes that process much simpler as one can just feed it a normal IP address.
2016-08-13 05:01:26 +01:00

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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