mail.sivuca.com.br has one IP number , which is the same as for sivuca.com.br, via cname , but the reverse is insvr3011.insite.com.br. neekos.net, crh.med.br, neekos.com, arun.com.br, sijp.com.br and at least 100 other hosts point to the same IP. sivuca.com.br is delegated to two nameservers, however both delegated nameservers are missing in the zone and two other nameservers are listed instead. Two nameservers have the same IP number. Two of them are on the same IP network. Incoming mail for sivuca.com.br is handled by one mailserver at com.br. mail.sivuca.com.br is hosted on a server in United States even though the hostname implies Brazil.