% APNIC found the following authoritative answer from: whois.ripe.net

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://apps.db.ripe.net/docs/HTML-Terms-And-Conditions

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '2001:610:120::/48'

% Abuse contact for '2001:610:120::/48' is 'cert@surfcert.nl'

inet6num:       2001:610:120::/48
netname:        IKONET-IPv6
descr:          NIKHEF
descr:          Amsterdam
country:        NL
admin-c:        NIK1975-RIPE
tech-c:         NIK1975-RIPE
status:         ALLOCATED-BY-LIR
mnt-by:         SN-LIR-MNT
mnt-irt:        irt-SURFcert
created:        2002-06-10T14:59:28Z
last-modified:  2021-01-28T11:54:56Z
source:         RIPE # Filtered

role:           Nikhef Network Operations Centre
address:        Science Park 105, NL 1098 XG Amsterdam, The Netherlands
remarks:        *** Dutch National Institute for Subatomic Physics
remarks:        *** send to noc@nikhef.nl for network issues, to
remarks:        *** as1104@nikhef.nl for peering requests, and
remarks:        *** complaints and abuse notices to security@nikhef.nl
fax-no:         +31205925155
admin-c:        TS6666
admin-c:        DG11973-RIPE
tech-c:         DG11973-RIPE
tech-c:         TS6666
nic-hdl:        NIK1975-RIPE
mnt-by:         AS1104-MNT
created:        2018-07-02T13:05:19Z
last-modified:  2022-02-07T12:42:27Z
source:         RIPE # Filtered

% Information related to '2001:610:120::/48AS1104'

route6:         2001:610:120::/48
descr:          NIKHEF-V6-NET
origin:         AS1104
mnt-by:         SN-LIR-MNT
mnt-by:         AS1103-MNT
mnt-by:         AS1104-MNT
mnt-routes:     AS1103-MNT
mnt-routes:     AS1104-MNT
created:        2022-02-23T13:19:50Z
last-modified:  2022-02-23T13:19:50Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.113.2 (ABERDEEN)

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