% 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://docs.db.ripe.net/terms-conditions.html

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

% Information related to '2a00:8a60:c000::/36'

% Abuse contact for '2a00:8a60:c000::/36' is 'abuse@rwth-aachen.de'

inet6num:       2a00:8a60:c000::/36
descr:          Group of customers # 12
netname:        ACHSEv6-C
country:        DE
admin-c:        NN2136-RIPE
tech-c:         CJV25-RIPE
tech-c:         NN2136-RIPE
status:         AGGREGATED-BY-LIR
assignment-size:48
mnt-by:         RWTH1-MNT
mnt-by:         de-rwthaachen-1-mnt
created:        2020-03-11T16:16:43Z
last-modified:  2020-03-11T16:20:37Z
source:         RIPE

person:         Christoph Viethen
address:        RWTH Aachen
address:        IT Center
address:        Wendlingweg 10
address:        52074 Aachen
address:        Germany
phone:          +49 241 80 29204
nic-hdl:        CJV25-RIPE
mnt-by:         RWTH1-MNT
created:        2015-04-29T14:44:54Z
last-modified:  2015-04-29T14:56:55Z
source:         RIPE # Filtered

person:         Nils Neumann
address:        RWTH Aachen
address:        IT Center
address:        Wendlingweg 10
address:        52074 Aachen
address:        Germany
phone:          +49 241 80 29214
nic-hdl:        NN2136-RIPE
mnt-by:         RWTH1-MNT
created:        2015-04-29T13:43:41Z
last-modified:  2015-04-29T15:21:02Z
source:         RIPE

% Information related to '2a00:8a60::/29AS47610'

route6:         2a00:8a60::/29
descr:          ACHSEv6
origin:         AS47610
mnt-by:         RWTH1-MNT
created:        2018-10-26T14:46:14Z
last-modified:  2018-10-26T14:48:17Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.114 (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