dns.inria.fr has one IP number , which also has a corresponding reverse pointer. ns1.ext.nic.fr point to the same IP. ma, oca.eu, cma.fr, imag.fr, unice.fr and at least 52 other hosts use this as a nameserver. inria.fr is a domain controlled by six nameservers. All of them are on different IP networks. Incoming mail for inria.fr is handled by four mailservers at national.inria.fr. All of them are on the same IP network. dns.inria.fr is hosted on a server in France.