We pick b.root-servers.net, one of the 13 root servers (1), and ask it about hotmail.ky and learn that ky is delegated to six name servers (2), so we ask kynse02.perimeterusa.com where we learn that hotmail.ky is delegated to three name servers, including ns5.msft.net (3), so we ask that one and get the following answer:
Hotmail.ky is a domain controlled by three domain name servers at msft.net having a total of six IP numbers. Some of them are on the same IP network. Hotmail.ky has two IP numbers (64.4.6.100, 65.55.39.10). Both are on different IP networks.
The two IP numbers 64.4.6.100 and 65.55.39.10 together
Three percent of the several thousand of host names that point to IP group 1 use the three name servers ns1, ns2 and ns5.msft.net together (but neither ns3 nor ns4.msft.net ), hereafter referred to as "name server group 2", (example: infopath.co, windows.com.mx and msn.com.pe ). Worth noting is that all of the domains that use name server group 2 point to IP group 1.