% 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://apps.db.ripe.net/docs/HTML-Terms-And-Conditions

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

% Information related to '91.208.64.0 - 91.208.64.255'

% Abuse contact for '91.208.64.0 - 91.208.64.255' is 'abuse@rolfschulz.it'

inetnum:        91.208.64.0 - 91.208.64.255
netname:        DE-ROLFSCHULZ-IT-20191107
country:        DE
org:            ORG-RS345-RIPE
admin-c:        RS24156-RIPE
tech-c:         RS24156-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         ROLFSCHULZ-IT-MNT
created:        2019-11-07T09:22:28Z
last-modified:  2023-04-04T14:19:17Z
source:         RIPE

organisation:   ORG-RS345-RIPE
org-name:       Rolf Schulz
country:        DE
org-type:       LIR
address:        Dudenstraße 36
address:        10965
address:        Berllin
address:        GERMANY
phone:          +493025016376
admin-c:        RS24156-RIPE
tech-c:         RS24156-RIPE
abuse-c:        AR56561-RIPE
mnt-ref:        ROLFSCHULZ-IT-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         ROLFSCHULZ-IT-MNT
created:        2019-11-06T12:22:27Z
last-modified:  2020-12-16T12:40:29Z
source:         RIPE # Filtered

role:           Rolf Schulz
address:        Dudenstrasse 36
address:        10965
address:        Berlin
address:        GERMANY
phone:          +493025016376
nic-hdl:        RS24156-RIPE
mnt-by:         ROLFSCHULZ-IT-MNT
created:        2019-11-06T12:22:26Z
last-modified:  2023-06-25T22:37:45Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.112.1 (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