dns14.fpt.vn has one IP number , but the reverse is dns2.hcm.fpt.vn. dns2.hcm.fpt.vn point to the same IP. adc.vn, lhc.vn, vcg.vn, lili.vn, sacc.vn and at least 100 other hosts use this as a nameserver. fpt.vn is a domain controlled by two nameservers at fpt.vn themselves. They are on the same IP network. Incoming mail for fpt.vn is handled by three mailservers also at fpt.vn. All of them are on the same IP network. dns14.fpt.vn is hosted on a server in Vietnam.