ns.jo1004.com has one IP number. ns.bkbc.org, ns.jfam.net, ns.11-3.net, ns.dhch.net, ns.2an2.com and at least 100 other hosts point to the same IP. jo1004.com use this as a nameserver. jo1004.com is delegated to two nameservers, however two extra nameservers are listed in the zone. There are two duplicated IP numbers. Some of them are on the same IP network. Incoming mail for jo1004.com is handled by one mailserver at com. jo1004.com has one IP number. ns.jo1004.com is hosted on a server in Korea.