% 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 '91.204.8.0 - 91.204.11.255'

% Abuse contact for '91.204.8.0 - 91.204.11.255' is 'abuse@1und1.net'

inetnum:        91.204.8.0 - 91.204.11.255
netname:        Biotronik
country:        DE
org:            ORG-BGC2-RIPE
admin-c:        GB6809-RIPE
tech-c:         TF1653-RIPE
status:         ASSIGNED PI
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         VT-ENGI-MNT
mnt-routes:     VT-ENGI-MNT
mnt-domains:    VT-DOMAIN-MNT
created:        2008-05-23T11:23:04Z
last-modified:  2016-04-14T09:23:13Z
source:         RIPE
sponsoring-org: ORG-KG4-RIPE

organisation:   ORG-BGC2-RIPE
org-name:       Biotronik SE & Co.KG
country:        DE
org-type:       OTHER
address:        Woermannkehre 1
address:        12359 Berlin
abuse-c:        AR30262-RIPE
mnt-ref:        VT-ENGI-MNT
mnt-by:         VT-ENGI-MNT
created:        2008-04-15T08:51:36Z
last-modified:  2022-12-01T16:17:40Z
source:         RIPE # Filtered

person:         Guenter Behrens
remarks:        Netadministrator
address:        Biotronik SE & Co KG
address:        Woermannkehre 1
address:        12359 Berlin
address:        Germany
phone:          +49 (0) 30 68905-2410
nic-hdl:        GB6809-RIPE
mnt-by:         VT-MNT
created:        2008-05-28T07:30:55Z
last-modified:  2010-03-24T11:39:39Z
source:         RIPE # Filtered

person:         Thoralf Freitag
remarks:        Netadministrator
address:        Biotronik SE & Co KG
address:        Woermannkehre 1
address:        12359 Berlin
address:        Germany
phone:          +49 (0) 30 68905-4611
nic-hdl:        TF1653-RIPE
mnt-by:         VT-MNT
created:        2008-05-28T07:27:45Z
last-modified:  2010-03-24T11:39:38Z
source:         RIPE # Filtered

% Information related to '91.204.8.0/22AS47274'

route:          91.204.8.0/22
descr:          Biotronik
origin:         AS47274
mnt-by:         VT-ENGI-MNT
created:        2008-05-29T08:26:48Z
last-modified:  2008-05-29T08:26:48Z
source:         RIPE

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

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