% 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 '89.204.136.0 - 89.204.143.255'

% Abuse contact for '89.204.136.0 - 89.204.143.255' is 'abuse.de@telefonica.com'

inetnum:        89.204.136.0 - 89.204.143.255
netname:        o2-Germany-Netblock-1-BER
descr:          Telefonica o2 (Germany) GmbH & Co. OHG
country:        DE
admin-c:        OGER-RIPE
tech-c:         OGER-RIPE
status:         ASSIGNED PA
mnt-by:         O2GERMANY-MNT
created:        2009-11-10T08:16:01Z
last-modified:  2009-11-10T08:16:01Z
source:         RIPE # Filtered

role:           o2 Germany IP Network Engineering
address:        Georg-Brauchle-Ring 50
address:        80992 Muenchen
address:        DE
phone:          +498924420
fax-no:         +498924420
abuse-mailbox:  abuse.de@telefonica.com
admin-c:        DK9212-RIPE
admin-c:        RCM25-RIPE
tech-c:         TGH17-RIPE
nic-hdl:        OGER-RIPE
mnt-by:         O2GERMANY-MNT
created:        2006-02-20T12:56:43Z
last-modified:  2022-03-31T09:18:24Z
source:         RIPE # Filtered

% Information related to '89.204.128.0/20AS6805'

route:          89.204.128.0/20
descr:          Telefonica Germany GmbH & Co. OHG
origin:         AS6805
mnt-by:         MDA-Z
created:        2018-07-03T12:09:13Z
last-modified:  2018-07-03T12:09:13Z
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