% 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 '91.211.12.0 - 91.211.15.255'

% Abuse contact for '91.211.12.0 - 91.211.15.255' is 'abuse@optik.net.ua'

inetnum:        91.211.12.0 - 91.211.15.255
netname:        OPTIK-UA-NET
remarks:        Optik.Net.UA
country:        UA
org:            ORG-TA374-RIPE
admin-c:        NSD8-RIPE
tech-c:         LEXZ-RIPE
status:         ASSIGNED PI
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         OPTIK-UA-MNT
mnt-routes:     OPTIK-UA-MNT
mnt-domains:    OPTIK-UA-MNT
created:        2008-11-26T14:16:36Z
last-modified:  2022-12-28T16:06:09Z
source:         RIPE # Filtered
sponsoring-org: ORG-IC4-RIPE

organisation:   ORG-TA374-RIPE
org-name:       TOV "FORT-POST"
country:        UA
remarks:        Optik.Net.UA
org-type:       OTHER
address:        Ukraine, 10001 Zhitomir, Kyivska st. 77
phone:          +380577642211
fax-no:         +380577642211
abuse-c:        AR25548-RIPE
admin-c:        OPTK-RIPE
tech-c:         LEXZ-RIPE
mnt-ref:        OPTIK-UA-MNT
mnt-by:         OPTIK-UA-MNT
created:        2008-10-28T06:40:15Z
last-modified:  2022-12-01T16:54:23Z
source:         RIPE # Filtered

person:         Alex Podkolzin
address:        Geroev Stalingrada 189
phone:          +38 068 606 89 65
nic-hdl:        LEXZ-RIPE
mnt-by:         OPTIK-UA-MNT
created:        2008-06-10T13:26:54Z
last-modified:  2010-11-30T10:36:36Z
source:         RIPE # Filtered

person:         Sergey Naydovsky
address:        Tehnaukservice, ltd.
address:        257, Moskovsky, ave.
address:        Kharkov, Ukraine
phone:          +380577516081
fax-no:         +380668680133
nic-hdl:        NSD8-RIPE
mnt-by:         TNSUA-MNT
created:        2003-09-13T10:40:58Z
last-modified:  2015-10-15T20:51:59Z
source:         RIPE # Filtered

% Information related to '91.211.12.0/22AS21500'

route:          91.211.12.0/22
origin:         AS21500
mnt-by:         TNSUA-MNT
created:        2022-10-10T12:00:26Z
last-modified:  2022-10-10T12:00:26Z
source:         RIPE

% Information related to '91.211.12.0/22AS48471'

route:          91.211.12.0/22
descr:          OPTIK-UA route
origin:         AS48471
mnt-by:         OPTIK-UA-MNT
created:        2008-12-01T20:11:37Z
last-modified:  2022-07-06T09:22:23Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.112 (BUSA)

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