ns.hq.com has one IP number. ns.vantasinc.com point to the same IP. 176.73.216.in-addr.arpa use this as a nameserver. hq.com is a domain controlled by four nameservers at netnames.net. All of them are on different IP networks. Incoming mail for hq.com is handled by two mailservers also at netnames.net. They are on different IP networks. hq.com has one IP number. ns.hq.com is hosted on a server in United States.