We pick a.root-servers.net, one of the 13 root servers (1), and ask it about bridge-academy.org and learn that org is delegated to six name servers (2), so we ask b2.org.afilias-nst.org where we learn that bridge-academy.org is delegated to three name servers, including ns1.slicehost.net (3), so we ask that one and get the following answer:
Bridge-academy.org is a domain controlled by four domain name servers at googlemail.com and slicehost.net having a total of twelve IP numbers. Two domain name servers have the same IP number. Some of them are on the same IP network. Incoming mail for bridge-academy.org is handled by six mail servers at googlemail.com and google.com having a total of 55 IP numbers. There are 22 duplicated IP numbers. Some of them are on the same IP network. Bridge-academy.org has one IP number (198.211.109.138), but the reverse is ?.
