% 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 '175.28.8.0 - 175.28.11.255'

% Abuse contact for '175.28.8.0 - 175.28.11.255' is 'ap.eis-netops@global.ntt'

inetnum:        175.28.8.0 - 175.28.11.255
netname:        NTT-SGP-AP
descr:          NTT Singapore Pte Ltd
country:        SG
org:            ORG-NSPL9-AP
admin-c:        IE11-AP
tech-c:         IE11-AP
abuse-c:        AN734-AP
status:         ALLOCATED PORTABLE
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-SG-NTTS
mnt-irt:        IRT-NTT-SG
last-modified:  2020-06-10T13:06:22Z
source:         APNIC

irt:            IRT-NTT-SG
address:        NTT Singapore Pte Ltd, 8 Kallang Avenue,
e-mail:         ap.eis-netops@global.ntt
abuse-mailbox:  ap.eis-netops@global.ntt
admin-c:        NAA7-AP
tech-c:         IE11-AP
auth:           # Filtered
remarks:        ap.eis-netops@global.ntt was validated on 2025-08-25
mnt-by:         MAINT-SG-NTTS
last-modified:  2025-12-04T01:00:18Z
source:         APNIC

organisation:   ORG-NSPL9-AP
org-name:       NTT Singapore Pte Ltd
org-type:       LIR
country:        SG
address:        20 West, Pasir Panjang Road
address:        # 11-28, Mapletree Business City
phone:          +65-6438-3101
fax-no:         +65-6438-3102
e-mail:         ap.eis-netops@global.ntt
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2025-07-02T13:10:19Z
source:         APNIC

role:           ABUSE NTTSG
country:        ZZ
address:        NTT Singapore Pte Ltd, 8 Kallang Avenue,
phone:          +000000000
e-mail:         ap.eis-netops@global.ntt
admin-c:        NAA7-AP
tech-c:         IE11-AP
nic-hdl:        AN734-AP
remarks:        Generated from irt object IRT-NTT-SG
remarks:        ap.eis-netops@global.ntt was validated on 2025-08-25
abuse-mailbox:  ap.eis-netops@global.ntt
mnt-by:         APNIC-ABUSE
last-modified:  2025-12-04T01:00:17Z
source:         APNIC

person:         IP ENGINEERING - AS17645
nic-hdl:        IE11-AP
e-mail:         ap.eis-netops@global.ntt
address:        NTT Communications Group Company
address:        NTT Singapore Pte Ltd
                20 West, Pasir Panjang Road
                #11-28, Mapletree Business City, S117439
phone:          +65 6973 3612
country:        SG
mnt-by:         MAINT-SG-NTTS
last-modified:  2025-07-01T09:55:34Z
source:         APNIC

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