ns0.pasteur.fr has one IP number , which also has a corresponding reverse pointer. cns.fr, eu.org, utc.fr, ircam.fr, ensta.fr and at least 37 other hosts use this as a nameserver. pasteur.fr is a domain controlled by two nameservers at pasteur.fr themselves. They are on the same IP network. Incoming mail for pasteur.fr is handled by two mailservers also at pasteur.fr. They are on the same IP network. pasteur.fr has one IP number. ns0.pasteur.fr is hosted on a server in France.