% 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 '203.123.48.0 - 203.123.55.255'

% Abuse contact for '203.123.48.0 - 203.123.55.255' is 'noc@dcs1.biz'

inetnum:        203.123.48.0 - 203.123.55.255
netname:        DCS1PTELTD-SG
descr:          DCS1 Pte. Ltd.
country:        SG
org:            ORG-DPL42-AP
admin-c:        DPLA27-AP
tech-c:         DPLA27-AP
abuse-c:        AD1423-AP
status:         ALLOCATED PORTABLE
mnt-by:         APNIC-HM
mnt-lower:      MAINT-DCS1PTELTD-SG
mnt-routes:     MAINT-DCS1PTELTD-SG
mnt-irt:        IRT-DCS1PTELTD-SG
last-modified:  2025-04-22T13:14:29Z
source:         APNIC

irt:            IRT-DCS1PTELTD-SG
address:        562a Serangoon Rd, Singapore SG 218178
e-mail:         noc@dcs1.biz
abuse-mailbox:  noc@dcs1.biz
admin-c:        DPLA27-AP
tech-c:         DPLA27-AP
auth:           # Filtered
remarks:        noc@dcs1.biz was validated on 2025-09-30
mnt-by:         MAINT-DCS1PTELTD-SG
last-modified:  2025-11-18T00:38:17Z
source:         APNIC

organisation:   ORG-DPL42-AP
org-name:       DCS1 Pte. Ltd.
org-type:       LIR
country:        SG
address:        562a Serangoon Rd
phone:          +6598551208
e-mail:         noc@dcs1.biz
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2025-03-07T13:11:00Z
source:         APNIC

role:           ABUSE DCS1PTELTDSG
country:        ZZ
address:        562a Serangoon Rd, Singapore SG 218178
phone:          +000000000
e-mail:         noc@dcs1.biz
admin-c:        DPLA27-AP
tech-c:         DPLA27-AP
nic-hdl:        AD1423-AP
remarks:        Generated from irt object IRT-DCS1PTELTD-SG
remarks:        noc@dcs1.biz was validated on 2025-09-30
abuse-mailbox:  noc@dcs1.biz
mnt-by:         APNIC-ABUSE
last-modified:  2025-09-30T13:44:56Z
source:         APNIC

role:           DCS1 Pte Ltd administrator
address:        562a Serangoon Rd, Singapore SG 218178
country:        SG
phone:          +6598551208
e-mail:         noc@dcs1.biz
admin-c:        DPLA27-AP
tech-c:         DPLA27-AP
nic-hdl:        DPLA27-AP
mnt-by:         MAINT-DCS1PTELTD-SG
last-modified:  2025-04-18T06:30:17Z
source:         APNIC

% Information related to '203.123.48.0/21AS37989'

route:          203.123.48.0/21
descr:          Main Network for DCS1
origin:         AS37989
country:        SG
notify:         sanjeev@dcs1.biz
mnt-lower:      MAINT-DCS1PTELTD-SG
mnt-routes:     MAINT-DCS1PTELTD-SG
mnt-by:         MAINT-DCS1PTELTD-SG
last-modified:  2025-04-22T06:15:21Z
source:         APNIC

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