% 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 '203.185.136.0 - 203.185.136.255'

% Abuse contact for '203.185.136.0 - 203.185.136.255' is 'noc@thaisarn.net.th'

inetnum:        203.185.136.0 - 203.185.136.255
netname:        NSTDA-TH
descr:          National Science and Technology Development Agency
country:        TH
admin-c:        SS3770-AP
tech-c:         SS3770-AP
abuse-c:        AN946-AP
status:         ASSIGNED NON-PORTABLE
mnt-by:         MAINT-NECTEC-AP
mnt-irt:        IRT-NECTEC-TH
last-modified:  2022-07-21T13:39:07Z
source:         APNIC

irt:            IRT-NECTEC-TH
address:        National Electronic and Computer Technology Center (NECTEC)
address:        11th Floor , Bangkok Thai Tower,
address:        Phayathai, Bangkok
e-mail:         noc@thaisarn.net.th
abuse-mailbox:  noc@thaisarn.net.th
admin-c:        AA6-AP
tech-c:         NM25-AP
tech-c:         SS3770-AP
auth:           # Filtered
remarks:        noc@thaisarn.net.th is invalid
mnt-by:         MAINT-NECTEC-AP
last-modified:  2025-12-24T13:06:43Z
source:         APNIC

role:           ABUSE NECTECTH
country:        ZZ
address:        National Electronic and Computer Technology Center (NECTEC)
address:        11th Floor , Bangkok Thai Tower,
address:        Phayathai, Bangkok
phone:          +000000000
e-mail:         noc@thaisarn.net.th
admin-c:        AA6-AP
tech-c:         NM25-AP
tech-c:         SS3770-AP
nic-hdl:        AN946-AP
remarks:        Generated from irt object IRT-NECTEC-TH
remarks:        noc@thaisarn.net.th is invalid
abuse-mailbox:  noc@thaisarn.net.th
mnt-by:         APNIC-ABUSE
last-modified:  2025-12-24T13:07:48Z
source:         APNIC

person:         Sittichai Sangdee
address:        National Electronics and Computer Technology Center
address:        112 Thailand Science Park, Phahon-Yothin Road, Klong Luang, Pathumthani 12120, Thailand
country:        TH
phone:          +66-2-564-6856
e-mail:         sittichai.sangdee@nectec.or.th
nic-hdl:        SS3770-AP
mnt-by:         MAINT-TH-NECTEC
fax-no:         +66-2-564-6863
last-modified:  2018-11-27T16:03:24Z
source:         APNIC

% Information related to '203.185.136.0/24AS38296'

route:          203.185.136.0/24
origin:         AS38296
descr:          National Electronics and Computer Technology Center
                112 Thailand Science Park
                Phahon Yothin Road
                Klong 1
mnt-by:         MAINT-NECTEC-AP
last-modified:  2022-07-21T04:17:10Z
source:         APNIC

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