ns.icann.org has one IP number , which also has a corresponding reverse pointer. ns1.auth.iana.org point to the same IP. om, int, museum, iana.net, dnso.org and at least 45 other hosts use this as a nameserver. icann.org is a domain controlled by five nameservers. Two of them are on the same IP network. Incoming mail for icann.org is handled by eight mailservers at icann.org themselves. Some of them are on the same IP network. icann.org has one IP number. ns.icann.org is hosted on a server in United States.