% 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 '213.87.120.0 - 213.87.121.255'

% Abuse contact for '213.87.120.0 - 213.87.121.255' is 'abuse@mtu.ru'

inetnum:        213.87.120.0 - 213.87.121.255
netname:        MTSNET-SIB4
descr:          Mobile subscribers pool
remarks:        INFRA-AW
country:        RU
admin-c:        MA14315-RIPE
tech-c:         MN9513-RIPE
status:         ASSIGNED PA
mnt-by:         MR-SIB-MTS-MNT
created:        2011-03-09T09:14:04Z
last-modified:  2015-08-05T11:20:18Z
source:         RIPE # Filtered

role:           MR-SIB-MTS Administration
address:        MTS PJSC, MR Sibir
address:        90/1, Bogdana Khmelnitskogo
address:        630110, Novosibirsk, Russia
admin-c:        VO45-RIPE
tech-c:         VO45-RIPE
nic-hdl:        MA14315-RIPE
mnt-by:         MR-SIB-MTS-MNT
created:        2013-04-10T05:20:54Z
last-modified:  2020-12-03T07:40:26Z
source:         RIPE # Filtered

role:           MR-SIB-MTS NOC
address:        MTS PJSC, MR Sibir
address:        90/1, Bogdana Khmelnitskogo
address:        630110, Novosibirsk, Russia
admin-c:        VO45-RIPE
tech-c:         VO45-RIPE
tech-c:         DD9030-RIPE
nic-hdl:        MN9513-RIPE
mnt-by:         MR-SIB-MTS-MNT
created:        2013-04-10T05:22:04Z
last-modified:  2020-12-03T07:40:56Z
source:         RIPE # Filtered

% Information related to '213.87.120.0/23AS28884'

route:          213.87.120.0/23
descr:          MTS PJSC, MR Sibir
origin:         AS28884
mnt-by:         MR-SIB-MTS-MNT
created:        2011-03-09T09:16:14Z
last-modified:  2015-10-09T07:05:05Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.114 (SHETLAND)

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