ns1.it.tko.fi has one IP number , which also has a corresponding reverse pointer. ns.vip.fi, ns.sgic.fi and ns1.finnetcom.net point to the same IP. tko.fi, hpo.fi, ark.fi, htk.fi, vip.fi and at least 100 other hosts use this as a nameserver. it.tko.fi is a domain controlled by four nameservers. All of them are on different IP networks. Incoming mail for it.tko.fi is handled by two mailservers having a total of three IP numbers. Two of them are on the same IP network. ns1.it.tko.fi is hosted on a server in Finland.