s102.x1.fr has one IP number , which also has a corresponding reverse pointer. ipees.com, fisaa.net, ams78.com, vuici.com, adeliz.net and at least 100 other hosts point to the same IP. x1.fr is a domain controlled by two nameservers at tgv.net. They are on different IP networks. Incoming mail for x1.fr is handled by one mailserver at x1.fr themselves. x1.fr has one IP number , but the reverse is ns0.tgv.net. s102.x1.fr is hosted on a server in France.