% 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 '5.144.112.0 - 5.144.119.255'

% Abuse contact for '5.144.112.0 - 5.144.119.255' is 'abuse@mtu.ru'

inetnum:        5.144.112.0 - 5.144.119.255
netname:        MTS-SPB-FIX
descr:          OJSC "Mobile TeleSystems"
country:        RU
remarks:        B2C FIX
admin-c:        LTr1-RIPE
tech-c:         LTr1-RIPE
status:         ASSIGNED PA
mnt-by:         LANCK-MNT
created:        2014-07-23T08:17:50Z
last-modified:  2014-12-29T13:20:45Z
source:         RIPE

role:           Mobile TeleSystems NW role
address:        PJSC "Mobile TeleSystems"
address:        Malay Monetnaya d.2a
address:        197101, Saint Petersburg
address:        Russia
phone:          +7 812 318 1211
fax-no:         +7 812 333 3131
remarks:        ---------------------------------------------------
remarks:        ***************************************************
remarks:        ********* Spam, Viruses: abuse@mtu.ru *********
remarks:        ***************************************************
remarks:        ---------------------------------------------------
abuse-mailbox:  abuse@mtu.ru
admin-c:        MTU1-RIPE
tech-c:         MTU1-RIPE
nic-hdl:        LTr1-RIPE
mnt-by:         LANCK-MNT
created:        2004-08-18T07:16:13Z
last-modified:  2020-12-17T10:04:08Z
source:         RIPE # Filtered

% Information related to '5.144.112.0/21AS13062'

route:          5.144.112.0/21
descr:          RU-MTS-SPB
origin:         AS13062
mnt-by:         LANCK-MNT
created:        2014-07-23T06:20:47Z
last-modified:  2014-08-21T06:59:33Z
source:         RIPE

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