dns-ndk.vnnic.vn has one IP number , which also has a corresponding reverse pointer. vsd.vn, btk.vn, isp.vn, glr.vn, vtv.vn and at least 100 other hosts use this as a nameserver. vnnic.vn is a domain controlled by three nameservers at vnnic.net.vn. Two of them are on the same IP network. Incoming mail for vnnic.vn is handled by one mailserver at vnnic.vn themselves. vnnic.vn has one IP number. dns-ndk.vnnic.vn is hosted on a server in Vietnam.