We pick k.root-servers.net, one of the 13 root servers (1), and ask it about gatinha.org and learn that org is delegated to six name servers (2), so we ask a0.org.afilias-nst.info where we learn that gatinha.org is delegated to two name servers, including 02.dnsv.jp (3), so we ask that one and get the following answer:
Gatinha.org is a domain controlled by two domain name servers at dnsv.jp. Both are on different IP networks. Incoming mail for gatinha.org is handled by seven mail servers at googlemail.com and google.com having a total of 58 IP numbers. There are 31 duplicated IP numbers. Some of them are on the same IP network.