We pick i.root-servers.net, one of the 13 root servers (1), and ask it about cepl.org and learn that org is delegated to six name servers (2), so we ask c0.org.afilias-nst.info where we learn that cepl.org is delegated to two name servers, including ns.buydomains.com (3), so we ask that one and get the following answer:
Cepl.org is a domain controlled by two domain name servers at bluerazor.com. Both are on different IP networks. Incoming mail for cepl.org is handled by two mail servers at secureserver.net. Both are...