We pick d.root-servers.net, one of the 13 root servers (1), and ask it about mail.im and learn that im is delegated to four name servers (2), so we ask barney.advsys.co.uk where we learn that mail.im is delegated to two name servers, including mns02.domaincontrol.com (3), so we ask that one and get the following answer:
Mail.im is a domain controlled by two domain name servers at domaincontrol.com having a total of four IP numbers. All four of them are on different IP networks. Incoming mail for mail.im is handled by five mail servers at googlemail.com and google.com having a total of 47 IP numbers. There are 15 duplicated IP numbers. Some of them are on the same IP network. Mail.im has one IP number (199.59.241.250), but the reverse is ?.
The two name servers mns01 and mns02.domaincontrol.com together
Eight percent of the several hundred of domains that use name server group 1 point only to the IP number 50.63.201.98 (example: 2r.me, 9e.me and fk.me ).
The IP number 199.59.241.250 only
There are several thousand of host names that point only to the IP number 199.59.241.250.