www.dtu.edu.vn has one IP number , which is the same as for dtu.edu.vn, but the reverse is localhost. dtu.edu.vn, duytan.edu.vn and www.duytan.edu.vn point to the same IP. dtu.edu.vn is delegated to two nameservers, however one delegated nameserver is missing in the zone. All nameservers are at dtu.edu.vn themselves. Two nameservers have the same IP number. Incoming mail for dtu.edu.vn is handled by seven mailservers having a total of 28 IP numbers. Some of them are on the same IP network. www.dtu.edu.vn is hosted on a server in Vietnam.