go
www.vdc.com.vn has one IP number , which is the same as for vdc.com.vn, but the reverse is localhost. vdc.vn, vdc.com.vn, megavnn.vn and www.megavnn.vn point to the same IP. vdc.com.vn is delegated to one nameserver, however one extra nameserver is listed in the zone. All nameservers are at vnn.vn. They are on different IP networks. Incoming mail for vdc.com.vn is handled by one mailserver also at vnn.vn. www.vdc.com.vn is hosted on a server in Vietnam.

www.vdc.com.vn
a records
 
+ 222.255.29.106 222.255.0.0/19 AS7643 localhost
+ --- localhost

vdc.com.vn
a records
 
+ 222.255.29.106 222.255.0.0/19 AS7643 localhost
+ --- localhost
ns-soa records
vdc-hn01.vnn.vn
+ 203.162.0.11 203.162.0.0/23 AS7643 -
+ --- -
ns records
hcm-server1.vnn.vn
+ 203.162.4.1 203.162.4.0/22 AS7643 -
+ --- -
vdc-hn01.vnn.vn
+ 203.162.0.11 203.162.0.0/23 AS7643 -
mx records
m80.vnn.vn
+ 203.162.0.80 203.162.0.0/23 AS7643 -
+ --- -
ip numbers of host
222.255.29.106
ptrs of ip numbers
localhost
hostnames sharing ip with a-records
megavnn.vn
vdc.com.vn
vdc.vn
www.megavnn.vn
nameservers missing in parent delegation
hcm-server1.vnn.vn