% 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 '223.16.0.0 - 223.19.255.255'

% Abuse contact for '223.16.0.0 - 223.19.255.255' is 'abuse@hgcbroadband.com'

inetnum:        223.16.0.0 - 223.19.255.255
netname:        HGCGLOBAL-HK
descr:          HGC Global Communications Limited
country:        HK
org:            ORG-HGCL2-AP
admin-c:        IH17-AP
tech-c:         IH17-AP
abuse-c:        AH921-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-HK-DENCHA
mnt-routes:     MAINT-HK-DENCHA
mnt-irt:        IRT-HUTCHISON-HK
last-modified:  2020-06-22T07:05:12Z
source:         APNIC

irt:            IRT-HUTCHISON-HK
address:        9/F Low Block ,
address:        Hutchison Telecom Tower,
address:        99 Cheung Fai Rd, Tsing Yi,
address:        HONG KONG
e-mail:         abuse@hgcbroadband.com
abuse-mailbox:  abuse@hgcbroadband.com
admin-c:        IH17-AP
tech-c:         IH17-AP
auth:           # Filtered
remarks:        abuse@hgcbroadband.com was validated on 2025-04-06
mnt-by:         MAINT-HK-DENCHA
last-modified:  2025-04-06T15:30:56Z
source:         APNIC

organisation:   ORG-HGCL2-AP
org-name:       HGC Global Communications Limited
org-type:       LIR
country:        HK
address:        9/F Hutchison Telecom Tower
address:        99 Cheung Fai Road
phone:          +852-2128-2828
fax-no:         +852-2128-3388
e-mail:         CHARLESLWH@hgc.com.hk
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:14:42Z
source:         APNIC

role:           ABUSE HUTCHISONHK
country:        ZZ
address:        9/F Low Block ,
address:        Hutchison Telecom Tower,
address:        99 Cheung Fai Rd, Tsing Yi,
address:        HONG KONG
phone:          +000000000
e-mail:         abuse@hgcbroadband.com
admin-c:        IH17-AP
tech-c:         IH17-AP
nic-hdl:        AH921-AP
remarks:        Generated from irt object IRT-HUTCHISON-HK
remarks:        abuse@hgcbroadband.com was validated on 2025-04-06
abuse-mailbox:  abuse@hgcbroadband.com
mnt-by:         APNIC-ABUSE
last-modified:  2025-04-06T15:31:29Z
source:         APNIC

person:         ITMM HGC
nic-hdl:        IH17-AP
e-mail:         support.dia@hgc.com.hk
address:        9/F Low Block ,
address:        Hutchison Telecom Tower,
address:        99 Cheung Fai Rd, Tsing Yi,
address:        HONG KONG
phone:          +852-21229555
fax-no:         +852-21239523
country:        HK
remarks:        Send spam reports to abuse@hgcbroadband.com
remarks:        and abuse reports to abuse@hgcbroadband.com
remarks:        Please include detailed information and
remarks:        times in HKT
mnt-by:         MAINT-HK-HGCADMIN
last-modified:  2025-04-06T15:48:12Z
source:         APNIC

% Information related to '223.16.48.0/20AS9304'

route:          223.16.48.0/20
origin:         AS9304
descr:          HGC Global Communications Limited
                9/F Hutchison Telecom Tower
                99 Cheung Fai Road
mnt-by:         MAINT-HK-DENCHA
last-modified:  2025-03-01T17:18:05Z
source:         APNIC

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