We pick l.root-servers.net, one of the 13 root servers (1), and ask it about wikiepdia.org and learn that org is delegated to six name servers (2), so we ask c0.org.afilias-nst.info where we learn that wikiepdia.org is delegated to three name servers, including ns1.wikimedia.org (3), so we ask that one and get the following answer:
Wikiepdia.org is a domain controlled by three domain name servers at wikimedia.org. Two of them are on the same IP network. Incoming mail for wikiepdia.org is handled by two mail servers also at wikimedia.org having a total of three IP numbers. Two of them are on the same IP network. Wikiepdia.org has two IP numbers (2620:0:860:ed1a::1, 208.80.152.201). Both are on different IP networks.