% 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 '91.208.138.0 - 91.208.138.255'

% Abuse contact for '91.208.138.0 - 91.208.138.255' is 'abuse@onu.edu.ua'

inetnum:        91.208.138.0 - 91.208.138.255
netname:        ONUIIM-NET
country:        UA
org:            ORG-NIMU1-RIPE
admin-c:        ND912-RIPE
tech-c:         NM1812-RIPE
status:         ASSIGNED PI
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-ONUIIM
mnt-routes:     MNT-ONUIIM
mnt-domains:    MNT-ONUIIM
created:        2008-08-14T09:12:41Z
last-modified:  2016-04-14T10:55:35Z
source:         RIPE
sponsoring-org: ORG-SESa1-RIPE

organisation:   ORG-NIMU1-RIPE
org-name:       National I.I. Mechnikov University of Odessa
country:        UA
org-type:       OTHER
address:        Dvoryanskaya str., 2, 65082, Odessa, Ukraine
abuse-c:        AR30810-RIPE
mnt-ref:        MNT-ONUIIM
mnt-by:         MNT-ONUIIM
created:        2008-08-11T14:00:08Z
last-modified:  2022-12-01T16:39:21Z
source:         RIPE # Filtered

person:         Nickolay Dragunovsky
address:        Odessa I.I. Mechnikov National University
address:        Dvoryanskaya str, 2
address:        65026 Odessa, Ukraine
mnt-by:         MNT-ONUIIM
phone:          +380 48 7238587
nic-hdl:        ND912-RIPE
created:        2005-08-05T07:17:28Z
last-modified:  2009-12-14T10:41:24Z
source:         RIPE # Filtered

person:         Nickolay Muzyka
address:        Odessa I.I. Mechnikova National University
address:        Dvoryanskaya str, 2
address:        65080 Odessa, Ukraine
mnt-by:         MNT-ONUIIM
phone:          +380 0482 329228
nic-hdl:        NM1812-RIPE
created:        2008-08-11T13:45:45Z
last-modified:  2009-12-14T10:40:03Z
source:         RIPE # Filtered

% Information related to '91.208.138.0/24AS47799'

route:          91.208.138.0/24
descr:          ONUIIM ALLOCATION
origin:         AS47799
mnt-by:         MNT-ONUIIM
created:        2008-11-24T15:24:08Z
last-modified:  2008-11-24T15:24:08Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.113.2 (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