% 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 'APNIC-HM'

mntner:         APNIC-HM
descr:          Maintainer for allocations/assignments made by APNIC
descr:          Objects maintained by this maintainer may
descr:          only be changed by APNIC Hostmasters.
admin-c:        HM20-AP
tech-c:         NO4-AP
upd-to:         helpdesk@apnic.net
auth:           # Filtered
notify:         helpdesk@apnic.net
mnt-by:         APNIC-HM
referral-by:    APNIC-HM
last-modified:  2018-05-18T06:06:12Z
source:         APNIC

role:           APNIC Hostmaster
address:        6 Cordelia Street
address:        South Brisbane
address:        QLD 4101
country:        AU
phone:          +61 7 3858 3100
fax-no:         +61 7 3858 3199
e-mail:         helpdesk@apnic.net
admin-c:        AMS11-AP
tech-c:         AH256-AP
nic-hdl:        HM20-AP
remarks:        Administrator for APNIC
notify:         hostmaster@apnic.net
mnt-by:         MAINT-APNIC-AP
last-modified:  2013-10-23T04:06:51Z
source:         APNIC

person:         APNIC Network Operations
address:        6 Cordelia Street
address:        South Brisbane
address:        QLD 4101
country:        AU
phone:          +61 7 3858 3100
fax-no:         +61 7 3858 3199
e-mail:         netops@apnic.net
nic-hdl:        NO4-AP
remarks:        Administrator for APNIC Network Operations
notify:         helpdesk@apnic.net
mnt-by:         MAINT-APNIC-AP
last-modified:  2023-11-29T22:50:07Z
source:         APNIC

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