ns3.oleane.net has one IP number , which also has a corresponding reverse pointer. aon.fr, cbs.fr, sfp.fr, lrf.fr, cgv.fr and at least 100 other hosts use this as a nameserver. atmel-nantes.fr use this as a mailserver. oleane.net is a domain controlled by three nameservers. Two of them are on the same IP network. Incoming mail for oleane.net is handled by one mailserver at dih.oleane.net. ns3.oleane.net is hosted on a server in France.