ns5.cap.gov has one IP number , but the reverse is dns4.nettica.com. ns4.dns.im, ns4.if1.ca, ns.xay.com, ns4.00.com, ns4.jump.biz and at least 100 other hosts point to the same IP. cap.gov use this as a nameserver. cap.gov is a domain controlled by four nameservers at cap.gov themselves. All of them are on different IP networks. Incoming mail for cap.gov is handled by six mailservers having a total of 20 IP numbers. Some of them are on the same IP network. cap.gov has one IP number. ns5.cap.gov is hosted on a server in United States.