tiger.cia.com has one IP number , which also has a corresponding reverse pointer. host.igs.net, mail.igs.net, mx04.cia.com, mail3.igs.net, mail2.igs.net and at least 21 other hosts point to the same IP. cia.com is delegated to two nameservers, however one extra nameserver is listed in the zone. All nameservers are at cia.com themselves. Two of them are on the same IP network. Incoming mail for cia.com is handled by six mailservers also at cia.com. Some of them are on the same IP network. cia.com has one IP number. tiger.cia.com is hosted on a server in Canada.