% 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 '203.150.128.0 - 203.150.143.255'

% Abuse contact for '203.150.128.0 - 203.150.143.255' is 'op-bb@inet.co.th'

inetnum:        203.150.128.0 - 203.150.143.255
netname:        INET-IBB-TH
descr:          INEXT Broadband Company Limited
country:        TH
admin-c:        TP539-AP
tech-c:         ITP2-AP
tech-c:         CW2606-AP
abuse-c:        AI832-AP
status:         ALLOCATED NON-PORTABLE
mnt-by:         MAINT-TH-INET
mnt-irt:        IRT-INET-IBB-TH
last-modified:  2023-08-09T04:09:16Z
source:         APNIC

irt:            IRT-INET-IBB-TH
address:        INEXT Broadband Company Limited
address:        1768 Thai Summit Tower, 10th Fl., New Petchaburi Road
address:        Khwaeng Bang Kapi, Khet Huay Khwang
address:        Bangkok 10310
e-mail:         op-bb@inet.co.th
abuse-mailbox:  op-bb@inet.co.th
admin-c:        TP539-AP
tech-c:         ITP2-AP
auth:           # Filtered
remarks:        op-bb@inet.co.th was validated on 2025-11-21
mnt-by:         MAINT-TH-INET
last-modified:  2025-11-21T08:49:57Z
source:         APNIC

role:           ABUSE INETIBBTH
country:        ZZ
address:        INEXT Broadband Company Limited
address:        1768 Thai Summit Tower, 10th Fl., New Petchaburi Road
address:        Khwaeng Bang Kapi, Khet Huay Khwang
address:        Bangkok 10310
phone:          +000000000
e-mail:         op-bb@inet.co.th
admin-c:        TP539-AP
tech-c:         ITP2-AP
nic-hdl:        AI832-AP
remarks:        Generated from irt object IRT-INET-IBB-TH
remarks:        op-bb@inet.co.th was validated on 2025-11-21
abuse-mailbox:  op-bb@inet.co.th
mnt-by:         APNIC-ABUSE
last-modified:  2025-11-21T08:50:25Z
source:         APNIC

person:         Chanon Watcharachinvong
address:        1768 Thai Summit Tower, 10-ITFl., New Petchaburi Road,Khwaeng Bang Kapi, Khet Huay Khwang, Bangkok 10310
country:        TH
phone:          +66-2257-7111
e-mail:         chanon.wa@inet.co.th
nic-hdl:        CW2606-AP
mnt-by:         MAINT-ITSC-AP
last-modified:  2023-08-09T04:05:42Z
source:         APNIC

person:         INTERNET THAILAND PCL
address:        1768 Thai Summit Tower, 10-ITFl., New Petchaburi Road,Khwaeng Bang Kapi, Khet Huay Khwang, Bangkok 10310
country:        TH
phone:          +66-2257-7111
e-mail:         op-network@inet.co.th
nic-hdl:        ITP2-AP
mnt-by:         MAINT-TH-INET
last-modified:  2022-06-13T06:34:28Z
source:         APNIC

person:         Thanut Prasertsan
address:        Internet Thailand Company Limited
country:        TH
phone:          +66-2257-7000
e-mail:         thanut.pr@inet.co.th
nic-hdl:        TP539-AP
mnt-by:         MAINT-ITSC-AP
last-modified:  2021-05-27T07:07:13Z
source:         APNIC

% Information related to '203.150.131.0/24AS4618'

route:          203.150.131.0/24
origin:         AS4618
descr:          Internet Thailand Company Ltd.
                1768 IFCT Tower, 10th-12th FL
                IT Floor New Petchburi Road
                Khwaeng Bang Kapi
                Khet Huay Khwang
mnt-by:         MAINT-TH-INET
last-modified:  2020-11-19T08:37:18Z
source:         APNIC

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