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{{tag>whois dns ddos lookup ips}}

====== whois lookup on list of IPs and find countries ======
For a list of IPs in file like this:
<code>
115.73.43.82
171.226.37.107
116.100.13.224
171.252.244.192
27.75.96.60
115.73.181.107
27.64.204.111
116.177.225.197
27.65.174.108
115.72.36.7
...
</code>

do a lookup with ''whois''
  for ip in $(cat list);do whois $ip |awk -F: '/country/ {print $2}'| sort;done > sorted1.txt

Then show sorted and aggregated.
  cat sorted1.txt |sort|uniq -c

If you get an error like:
  No whois server is known for this kind of object.

Could be the input file [[https://stackoverflow.com/questions/71044769/whois-with-a-list-of-domain-names-but-got-error-no-whois-server-is-known-for-th|is messed up]]. Use this command instead:

  while IFS=$' \t\r\n' read -r ip; do whois $ip |awk -F: '/country/ {print $2}'| sort; done < list > sorted

====== Tested on ======
  * Ubuntu 20.04

====== See also ======

====== References ======