% 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 '212.164.184.0 - 212.164.191.255'

% Abuse contact for '212.164.184.0 - 212.164.191.255' is 'abuse@rt.ru'

inetnum:        212.164.184.0 - 212.164.191.255
netname:        WEBSTREAM
descr:          OJSC "Rostelecom"
remarks:        Novosibirsk
remarks:        Filial of Open Joint Stock Company "Rostelecom"
remarks:        broadband service
country:        RU
remarks:
remarks:        NCC #2010061475
remarks:        INFRA AW
remarks:
admin-c:        YOL1-RIPE
tech-c:         YOL1-RIPE
mnt-by:         NSOELSV-NCC
mnt-routes:     NSOELSV-NCC
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 noc@sinor.ru
remarks:
created:        2010-10-28T09:29:19Z
last-modified:  2013-12-18T08:44:48Z
source:         RIPE # Filtered

person:         Yuri O. Larukov
address:        Long-distance Telephone Station of  Novosibirsk.
address:        Ordjonikidze 18, 630090, Novosibirsk, Russia.
phone:          +7 383-2048-123
nic-hdl:        YOL1-RIPE
mnt-by:         NSOELSV-NCC
created:        1970-01-01T00:00:00Z
last-modified:  2012-11-08T10:52:50Z
source:         RIPE # Filtered

% Information related to '212.164.184.0/21AS12389'

route:          212.164.184.0/21
descr:          Rostelecom networks
origin:         AS12389
mnt-by:         ROSTELECOM-MNT
created:        2018-10-25T14:25:20Z
last-modified:  2018-10-25T14:25:20Z
source:         RIPE # Filtered

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