% 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 '91.225.196.0 - 91.225.199.255'

% Abuse contact for '91.225.196.0 - 91.225.199.255' is 'mailbox@ultranet.com.ua'

inetnum:        91.225.196.0 - 91.225.199.255
netname:        UNTRANET
country:        UA
org:            ORG-KUKA1-RIPE
admin-c:        KUKA2-RIPE
tech-c:         KUKA2-RIPE
status:         ASSIGNED PI
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         KUKANOV-MNT
mnt-routes:     KUKANOV-MNT
mnt-domains:    KUKANOV-MNT
created:        2011-02-18T10:20:57Z
last-modified:  2016-04-14T11:06:13Z
source:         RIPE # Filtered
sponsoring-org: ORG-Vs35-RIPE

organisation:   ORG-KUKA1-RIPE
org-name:       FOP Kukanov Vitaly Yurievich
country:        UA
org-type:       OTHER
address:        Ukraine, Chernigov, ul. Mstislavskaya 15
abuse-c:        AR19785-RIPE
mnt-ref:        KUKANOV-MNT
mnt-by:         KUKANOV-MNT
created:        2011-02-12T17:57:39Z
last-modified:  2022-12-01T16:34:33Z
source:         RIPE # Filtered

person:         Vitaliy Kukanov
address:        Ukraine, Chernigov, Rodimtseva 2
phone:          +380462612607
nic-hdl:        KUKA2-RIPE
mnt-by:         KUKANOV-MNT
created:        2011-02-12T17:32:58Z
last-modified:  2014-12-18T19:55:23Z
source:         RIPE

% Information related to '91.225.198.0/23AS56435'

route:          91.225.198.0/23
descr:          UN23-2
origin:         AS56435
mnt-by:         KUKANOV-MNT
created:        2015-01-28T17:04:25Z
last-modified:  2015-01-28T17:04:25Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.116 (SHETLAND)