dns2.home.pl has one IP number , which also has a corresponding reverse pointer. ns2.maze.pl, b.ns.yupe.net and ns2.euromedia.pl point to the same IP. ik.pl, 7x.pl, cbz.pl, hol.pl, heg.pl and at least 100 other hosts use this as a nameserver. home.pl is a domain controlled by three nameservers at home.pl themselves. All of them are on different IP networks. Incoming mail for home.pl is handled by three mailservers at home.net.pl. All of them are on the same IP network. home.pl has one IP number. dns2.home.pl is hosted on a server in Poland.