ns1.google.tk has one IP number , but the reverse is ns1.google.com. tvojebaba.cz, ns1.google.de, ns1.google.es, ns1.google.vn, ns.google.com and at least 16 other hosts point to the same IP. google.tk is a domain controlled by four nameservers at google.com. All of them are on different IP networks. Incoming mail for google.tk is handled by four mailservers. All of them are on the same IP network. google.tk has three IP numbers. All of them are on different IP networks. ns1.google.tk is hosted on a server in United States even though the hostname implies Tokelau.