% 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 '161.64.0.0 - 161.64.255.255'

% Abuse contact for '161.64.0.0 - 161.64.255.255' is 'icto.net_irt@umac.mo'

inetnum:        161.64.0.0 - 161.64.255.255
netname:        UMAC
descr:          University of Macau
descr:          Macao SAR, P.R. of China
country:        MO
org:            ORG-UOM2-AP
admin-c:        AST8-AP
tech-c:         HOI1-AP
abuse-c:        AU161-AP
status:         ALLOCATED PORTABLE
remarks:        imported inetnum object for UNIVER-117
notify:         admin@um.edu.mo
mnt-by:         APNIC-HM
mnt-lower:      MAINT-MO-UMACNET
mnt-routes:     MAINT-MO-UMACNET
mnt-irt:        IRT-UMACNET-MO
last-modified:  2022-02-24T02:07:47Z
source:         APNIC

irt:            IRT-UMACNET-MO
address:        ICTO
address:        University of Macau
address:        Taipa
address:        Macau
e-mail:         icto.net_irt@umac.mo
abuse-mailbox:  icto.net_irt@umac.mo
admin-c:        AST8-AP
tech-c:         HOI1-AP
auth:           # Filtered
remarks:        icto.net_irt@umac.mo was validated on 2024-02-06
mnt-by:         MAINT-MO-UMACNET
last-modified:  2024-02-06T15:10:05Z
source:         APNIC

organisation:   ORG-UOM2-AP
org-name:       University of Macau
org-type:       LIR
country:        MO
address:        Information and Communication Technology Office
address:        Av. da Universidade
address:        Taipa
phone:          +853-88228616
fax-no:         +853-88222408
e-mail:         admin@um.edu.mo
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:15:01Z
source:         APNIC

role:           ABUSE UMACNETMO
address:        ICTO
address:        University of Macau
address:        Taipa
address:        Macau
country:        ZZ
phone:          +000000000
e-mail:         icto.net_irt@umac.mo
admin-c:        AST8-AP
tech-c:         HOI1-AP
nic-hdl:        AU161-AP
remarks:        Generated from irt object IRT-UMACNET-MO
remarks:        icto.net_irt@umac.mo was validated on 2024-02-06
abuse-mailbox:  icto.net_irt@umac.mo
mnt-by:         APNIC-ABUSE
last-modified:  2024-02-06T15:10:20Z
source:         APNIC

person:         Antony Si Tou
address:        Avenida da Universidade, Macau
country:        MO
phone:          +85388228600
e-mail:         admin@um.edu.mo
nic-hdl:        AST8-AP
mnt-by:         MAINT-UMAC-AP
last-modified:  2022-01-11T08:54:05Z
source:         APNIC

person:         Head of IUS
address:        University of Macau
country:        MO
phone:          +853 88228600
e-mail:         sfcheang@um.edu.mo
nic-hdl:        HOI1-AP
mnt-by:         MAINT-MO-UMACNET
last-modified:  2022-01-11T08:08:48Z
source:         APNIC

% Information related to '161.64.128.0/17AS7582'

route:          161.64.128.0/17
origin:         AS7582
descr:          University of Macau
                Information and Communication Technology Office
                Av. da Universidade
                Taipa
mnt-by:         MAINT-MO-UMACNET
last-modified:  2022-02-24T05:24:33Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.25 (WHOIS-AU1)

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