% APNIC found the following authoritative answer from: whois.apnic.net

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to '203.162.0.0 - 203.162.8.255'

% Abuse contact for '203.162.0.0 - 203.162.8.255' is 'hm-changed@vnnic.vn'

inetnum:        203.162.0.0 - 203.162.8.255
netname:        VDC-NET
country:        vn
descr:          VietNam Data Communication Company
admin-c:        VIG1-AP
tech-c:         VIG1-AP
status:         ALLOCATED NON-PORTABLE
mnt-by:         MAINT-VN-VNPT
last-modified:  2010-01-14T08:40:00Z
source:         APNIC

role:           VDC IPADMIN GROUP
address:        Internet Building, Block II, Thang Long Inter Village
country:        VN
phone:          +84-437877777
e-mail:         nmc.cmip@vnpt.vn
remarks:        send spam reports to nmc.cmip@vnpt.vn
admin-c:        THMH1-AP
tech-c:         THMH1-AP
nic-hdl:        VIG1-AP
mnt-by:         MAINT-VN-VNPT
fax-no:         +84-4 37876600
last-modified:  2019-06-25T02:07:13Z
source:         APNIC

% Information related to '203.162.3.0/24AS45899'

route:          203.162.3.0/24
descr:          VNPT
origin:         AS45899
mnt-by:         MAINT-VN-VNPT
last-modified:  2022-08-09T08:25:37Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-AU4)