% 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 '203.210.6.0 - 203.210.6.255'

% Abuse contact for '203.210.6.0 - 203.210.6.255' is 'corepssupport@pccw.com'

inetnum:        203.210.6.0 - 203.210.6.255
netname:        gprsnet
descr:          New World Mobility
country:        HK
admin-c:        IO35-AP
tech-c:         IP90-AP
abuse-c:        AH969-AP
status:         ASSIGNED NON-PORTABLE
mnt-by:         MAINT-AP-SYSENG
mnt-lower:      MAINT-AP-SYSENG
mnt-routes:     MAINT-AP-SYSENG
mnt-irt:        IRT-HKCSL-HK
last-modified:  2021-01-27T13:15:48Z
source:         APNIC

irt:            IRT-HKCSL-HK
address:        4/F, Lai Chi Kok Engineering II
address:        4 Yuet Lun Street,
address:        Lai Chi Kok
address:        Hong Kong
e-mail:         corepssupport@pccw.com
abuse-mailbox:  corepssupport@pccw.com
admin-c:        IO35-AP
tech-c:         IP90-AP
auth:           # Filtered
remarks:        corepssupport@pccw.com was validated on 2023-10-24
mnt-by:         MAINT-AP-SYSENG
last-modified:  2023-10-24T11:03:04Z
source:         APNIC

role:           ABUSE HKCSLHK
address:        4/F, Lai Chi Kok Engineering II
address:        4 Yuet Lun Street,
address:        Lai Chi Kok
address:        Hong Kong
country:        ZZ
phone:          +000000000
e-mail:         corepssupport@pccw.com
admin-c:        IO35-AP
tech-c:         IP90-AP
nic-hdl:        AH969-AP
remarks:        Generated from irt object IRT-HKCSL-HK
remarks:        corepssupport@pccw.com was validated on 2023-10-24
abuse-mailbox:  corepssupport@pccw.com
mnt-by:         APNIC-ABUSE
last-modified:  2023-10-24T11:03:06Z
source:         APNIC

person:         IPBB Operation
address:        3/F, Lai Chi Kok Engineering Center II
                4 Yuet Lun Street
                Hong Kong
country:        HK
phone:          +852-23464280
e-mail:         corepssupport@pccw.com
nic-hdl:        IO35-AP
remarks:        Please send spam and abuse reports to corepssupport@pccw.com
remarks:        with providing detail information and times in HKT.
remarks:        The phone number is only for emergency contact
abuse-mailbox:  corepssupport@pccw.com
mnt-by:         MAINT-AP-SYSENG
last-modified:  2016-08-04T02:55:19Z
source:         APNIC

person:         IPBB Planning
address:        3/F, Lai Chi Kok Engineering Centre II, 4 Yuet Lun Street
country:        HK
phone:          +852-23464280
e-mail:         IPBBPlanning@hkcsl.com
nic-hdl:        IP90-AP
abuse-mailbox:  corepssupport@pccw.com
mnt-by:         MAINT-AP-SYSENG
remarks:        Please send spam and abuse reports to corepssupport@pccw.com
remarks:        with providing detail information and times in HKT
remarks:        The phone number is only for emergency contact
last-modified:  2016-08-04T02:57:03Z
source:         APNIC

% Information related to '203.210.6.0/24AS38819'

route:          203.210.6.0/24
origin:         AS38819
descr:          CSL Limited
                3rd Floor
                Lai Chi Kok Engineering Center II
                4 Yuet Lun Street
mnt-by:         MAINT-AP-SYSENG
last-modified:  2024-01-24T07:51:20Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.25 (WHOIS-AU3)

Search for
IP address lookups			Miscellaneous queries
-l	1st level less specific		-i	Inverse attributes	None admin-c admin-c,tech-c,zone-c author cross-mnt cross-nfy local-as mbrs-by-ref member-of mnt-by mnt-lower mnt-nfy mnt-routes notify nserver origin person referral-by rev-srv sub-dom tech-c upd-to zone-c
-L	All less specific		-T	Object types	All as-block as-set aut-num domain filter-set inet-rtr inet6num inetnum irt key-cert mntner peering-set person role route route-set rtr-set
-m	1st level more specific
-M	All more specific		Query hints Include "AS" in front of an AS number. Example: AS4808 Include "-t" (template only) or "-v" (template and description) in front of an object name to view the template Example: -t inetnum
-x	Exact match only
-d	Associated reverse domain