% 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 '91.143.60.0 - 91.143.61.255'

% Abuse contact for '91.143.60.0 - 91.143.61.255' is 'abuse@mtu.ru'

inetnum:        91.143.60.0 - 91.143.61.255
netname:        MTS-FARNORTHNET
descr:          PJSC "MTS" branch Ural
descr:          Noyabrsk infrastructure network
remarks:        INFRA-AW
geoloc:         63.201801 75.450938
country:        RU
admin-c:        CCUB1-RIPE
tech-c:         CCUB1-RIPE
status:         ASSIGNED PA
mnt-by:         UTC-MNT
created:        2015-12-11T09:36:38Z
last-modified:  2019-07-02T16:45:18Z
source:         RIPE

role:           Mobile TeleSystems PJSC Ural Branch
address:        Ural Branch of Mobile TeleSystems PJSC
address:        128 Mamina-Sibiryaka
address:        Ekaterinburg 620026
address:        Russia
phone:          +7 343 3652230
admin-c:        AVP24-RIPE
tech-c:         AVP24-RIPE
abuse-mailbox:  abuse@mtu.ru
nic-hdl:        CCUB1-RIPE
mnt-by:         UTC-MNT
created:        2011-04-16T15:29:55Z
last-modified:  2021-04-07T11:47:09Z
source:         RIPE # Filtered

% Information related to '91.143.60.0/23AS44579'

route:          91.143.60.0/23
descr:          TNGS-FARNORTHNET network
origin:         AS44579
mnt-by:         TNGS-MNT
created:        2008-02-07T11:46:20Z
last-modified:  2008-04-02T05:08:02Z
source:         RIPE

% 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