% 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 '37.23.192.0 - 37.23.255.255'

% Abuse contact for '37.23.192.0 - 37.23.255.255' is 'abuse@rt.ru'

inetnum:        37.23.192.0 - 37.23.255.255
netname:        WEBSTREAM
descr:          JSC Rostelecom regional branch "Siberia"
remarks:        ALTAY broadband service
country:        RU
remarks:
remarks:        NCC #2011124892
remarks:        INFRA-AW
remarks:
admin-c:        AMN4-RIPE
tech-c:         AMN4-RIPE
mnt-by:         NSOELSV-NCC
mnt-by:         ROSTELECOM-MNT
mnt-lower:      NSOELSV-NCC
mnt-domains:    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 ab@ab.ru
remarks:
created:        2012-01-12T04:01:11Z
last-modified:  2012-01-31T05:05:26Z
source:         RIPE # Filtered

person:         Alexey M Nabootoff
address:        Russia Altai Republic 649000 Gorno-Altaisk
address:        Choros-Gurkina st. 17
phone:          +7 38822 95073
phone:          +7 38822 95252
fax-no:         +7 38822 95095
nic-hdl:        AMN4-RIPE
mnt-by:         NSOELSV-NCC
mnt-by:         GAGUES-MNT
created:        2003-12-02T07:25:55Z
last-modified:  2011-09-21T08:16:11Z
source:         RIPE # Filtered

% Information related to '37.23.192.0/18AS12389'

route:          37.23.192.0/18
descr:          JSC Rostelecom regional branch "Siberia"
remarks:        ALTAY branch
origin:         AS12389
mnt-by:         NSOELSV-NCC
mnt-by:         ROSTELECOM-MNT
created:        2019-04-30T02:19:23Z
last-modified:  2019-04-30T02:19:23Z
source:         RIPE # Filtered

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