% 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 '203.113.132.208 - 203.113.132.223'

% Abuse contact for '203.113.132.208 - 203.113.132.223' is 'hm-changed@vnnic.vn'

inetnum:        203.113.132.208 - 203.113.132.223
netname:        TTCNBOTULENHTT-NET
country:        VN
descr:          High Technology,  High Command and Communication Ministry
descr:          2 Lang Ha, Hanoi
admin-c:        TXT1-AP
tech-c:         TXT1-AP
status:         ASSIGNED NON-PORTABLE
mnt-by:         MAINT-VN-VIETEL
last-modified:  2008-09-04T06:54:24Z
source:         APNIC

person:         Tran Xuan Thinh
nic-hdl:        TXT1-AP
e-mail:         thinhtx@vietel.com.vn
address:        High Technology,  High Command and Communication Ministry
address:        2 Lang Ha, Hanoi
phone:          +84-4-2660095
country:        VN
mnt-by:         MAINT-VN-VIETEL
last-modified:  2008-09-04T07:31:38Z
source:         APNIC

% Information related to '203.113.132.0/24AS24086'

route:          203.113.132.0/24
descr:          VIETTEL-VN
origin:         AS24086
mnt-by:         MAINT-VN-VIETEL
last-modified:  2025-08-27T13:52:44Z
source:         APNIC

% Information related to '203.113.132.0/24AS38731'

route:          203.113.132.0/24
descr:          VIETTEL-VN
origin:         AS38731
mnt-by:         MAINT-VN-VIETEL
last-modified:  2025-08-27T13:58:24Z
source:         APNIC

% Information related to '203.113.132.0/24AS7552'

route:          203.113.132.0/24
descr:          VIETTEL-VN
origin:         AS7552
mnt-by:         MAINT-VN-VIETEL
last-modified:  2023-02-10T16:52:55Z
source:         APNIC

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