% 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 '2001:16b8:2000::/35'

% Abuse contact for '2001:16b8:2000::/35' is 'abuse@1und1.net'

inet6num:       2001:16b8:2000::/35
netname:        Customer-BRAS-Sued
country:        DE
admin-c:        VTH-RIPE
tech-c:         VTH-RIPE
status:         ASSIGNED
mnt-by:         VT-MNT
created:        2021-02-23T08:16:38Z
last-modified:  2021-02-23T08:16:38Z
source:         RIPE

role:           Versatel Hostmaster
remarks:        Internet Engineering
address:        Versatel West GmbH
address:        Unterste-Wilms-Strasse 29
address:        44143 Dortmund
address:        Germany
phone:          +49 (0) 231 399 0
abuse-mailbox:  abuse@1und1.net
admin-c:        OS1997-RIPE
admin-c:        TK1586-RIPE
admin-c:        BS4675-RIPE
admin-c:        FF9999-RIPE
admin-c:        SP15435-RIPE
admin-c:        MD26813-RIPE
tech-c:         TK1586-RIPE
tech-c:         BS4675-RIPE
tech-c:         FF9999-RIPE
tech-c:         SP15435-RIPE
tech-c:         MD26813-RIPE
nic-hdl:        VTH-RIPE
mnt-by:         VT-ENGI-MNT
created:        2004-05-19T12:48:36Z
last-modified:  2022-09-19T07:15:33Z
source:         RIPE # Filtered

% Information related to '2001:16b8:2200::/40AS8881'

route6:         2001:16b8:2200::/40
descr:          VT-DS-LITE-LAN-DUAL-stu1902aihr001
origin:         AS8881
mnt-by:         VT-MNT
created:        2017-04-07T05:34:34Z
last-modified:  2017-04-07T05:34:34Z
source:         RIPE

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

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