Summary
dns13.fpt.vn has one IP number , but the reverse is
dns1.hcm.fpt.vn.
dns1.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 delegated to two nameservers, however both delegated nameservers are missing in the zone and two other nameservers are listed instead. All nameservers are at
fpt.vn themselves. Some of them 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.
dns13.fpt.vn is hosted on a server in Vietnam.