*.arn.fr has one IP number , which is the same as for arn.fr, but the reverse is p15192150.pureserver.info. arn.fr, wbh.de, wsc.fr, eco.fr, stp.fr and at least 100 other hosts point to the same IP. arn.fr is a domain controlled by two nameservers at namesecure.de. They are on different IP networks. Incoming mail for arn.fr is handled by one mailserver at arn.fr themselves. *.arn.fr is hosted on a server in Germany even though the hostname implies France.