% 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 '90.188.236.0 - 90.188.255.255'

% Abuse contact for '90.188.236.0 - 90.188.255.255' is 'abuse@rt.ru'

inetnum:        90.188.236.0 - 90.188.255.255
netname:        WEBSTREAM
descr:          OJSC "Sibirtelecom"
remarks:        Irkutsk branch
remarks:        broadband service
country:        RU
remarks:
remarks:        NCC#2006103708
remarks:        INFRA-AW
remarks:
admin-c:        ICT2-RIPE
tech-c:         ICT2-RIPE
mnt-by:         IRTEL-MNT
status:         ASSIGNED PA
remarks:
remarks:        Direct reference for the general info on spam
remarks:        In unsoluble cases for the general info on spam,
remarks:        abusing & hacking complaints email abuse@sinor.ru
remarks:
created:        2006-10-29T09:13:53Z
last-modified:  2007-12-07T05:20:58Z
source:         RIPE # Filtered

role:           Irkutsk Central Telegraph
address:        Irkutsk branch of JSC "Sibirtelecom",
address:        Irkutsk Central Telegraph
address:        12, Proletarskaya ul.
address:        Irkutsk, 664011
address:        Russia
phone:          +7 395 2 242072
phone:          +7 395 2 242036
fax-no:         +7 395 2 240098
admin-c:        DN216-RIPE
tech-c:         VEK2-RIPE
nic-hdl:        ICT2-RIPE
mnt-by:         IRTEL-MNT
created:        2003-04-29T06:01:05Z
last-modified:  2021-10-06T09:47:00Z
source:         RIPE # Filtered

% Information related to '90.188.224.0/19AS12389'

route:          90.188.224.0/19
descr:          Rostelecom networks
origin:         AS12389
mnt-by:         ROSTELECOM-MNT
created:        2018-10-31T11:47:21Z
last-modified:  2018-10-31T11:47:21Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.111 (ABERDEEN)

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