eu107.activeby.net has one IP number , which also has a corresponding reverse pointer. vm.by, 14.by, bkk.by, muz.by, sst.by and at least 100 other hosts point to the same IP. geology.by use this as a nameserver. activeby.net is a domain controlled by three nameservers at activeby.net themselves. All of them are on different IP networks. Incoming mail for activeby.net is handled by two mailservers also at activeby.net. They are on the same IP network. eu107.activeby.net is hosted on a server in Netherlands.