% 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 '217.91.0.0 - 217.91.127.255'

% Abuse contact for '217.91.0.0 - 217.91.127.255' is 'abuse@telekom.de'

inetnum:        217.91.0.0 - 217.91.127.255
netname:        DTAG-STATIC01
descr:          Deutsche Telekom AG
descr:          T-DSL Business static dial-up
org:            ORG-DTAG1-RIPE
country:        DE
admin-c:        DTIP
tech-c:         DTST
status:         ASSIGNED PA
mnt-by:         DTAG-NIC
created:        2004-04-20T09:49:16Z
last-modified:  2014-06-18T11:17:48Z
source:         RIPE

organisation:   ORG-DTAG1-RIPE
org-name:       Deutsche Telekom AG
org-type:       OTHER
address:        Group Information Security, SDA/Abuse
address:        Deutsche Telekom Allee 9
address:        DE 64295 Darmstadt
remarks:        abuse contact in case of Spam,
                hack attacks, illegal activity,
                violation, scans, probes, etc.
mnt-ref:        DTAG-NIC
mnt-by:         DTAG-NIC
abuse-c:        DTAG4-RIPE
created:        2014-06-17T11:47:04Z
last-modified:  2021-02-22T13:35:19Z
source:         RIPE # Filtered

person:         DTAG Global IP-Addressing
address:        Deutsche Telekom AG
address:        Darmstadt, Germany
phone:          +49 180 2 33 1000
nic-hdl:        DTIP
mnt-by:         DTAG-NIC
created:        2003-01-29T10:22:59Z
last-modified:  2019-05-14T12:55:19Z
source:         RIPE # Filtered

person:         Security Team
address:        Deutsche Telekom AG
address:        Darmstadt, Germany
phone:          +49 180 2 33 1000
nic-hdl:        DTST
mnt-by:         DTAG-NIC
created:        2003-01-29T10:31:11Z
last-modified:  2019-05-14T12:56:39Z
source:         RIPE # Filtered

% Information related to '217.80.0.0/12AS3320'

route:          217.80.0.0/12
descr:          Deutsche Telekom AG, Internet service provider
origin:         AS3320
member-of:      AS3320:RS-PA-TELEKOM
mnt-by:         DTAG-RR
created:        1970-01-01T00:00:00Z
last-modified:  2004-06-15T17:32:53Z
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