% 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 '83.146.112.0 - 83.146.113.255'

% Abuse contact for '83.146.112.0 - 83.146.113.255' is 'abuse@ttk.ru'

inetnum:        83.146.112.0 - 83.146.113.255
netname:        SUTTK-ORB
descr:          Southern Urals TransTelecom
remarks:        INFRA-AW
country:        RU
admin-c:        SUTK-RIPE
tech-c:         SUTK-RIPE
status:         ASSIGNED PA
mnt-by:         SUTTK-MNT
mnt-routes:     SUTTK-MNT
mnt-lower:      SUTTK-MNT
created:        2022-06-17T09:09:38Z
last-modified:  2022-06-17T09:09:38Z
source:         RIPE

role:           SUTTK NOC
address:        Southern Urals TransTelecom
address:        60 Tsvilling Street
address:        Chelyabinsk
address:        Russia, 454111
phone:          +7 351 2111111
remarks:        ----------------------------------------------------------
remarks:        Points of contact for SUTTK Network Operations
remarks:        ----------------------------------------------------------
remarks:        Routing and peering issues: iptc@su.ttk.ru
remarks:        Network security issues: iptc@su.ttk.ru
remarks:        Mail and SPAM issues: iptc@su.ttk.ru
remarks:        VoIP issues: iptc@su.ttk.ru
remarks:        Customer support: iptc@su.ttk.ru
remarks:        ----------------------------------------------------------
nic-hdl:        SUTK-RIPE
abuse-mailbox:  iptc@su.ttk.ru
mnt-by:         SUTTK-MNT
created:        2006-02-27T06:58:15Z
last-modified:  2024-01-29T09:16:21Z
source:         RIPE # Filtered

% Information related to '83.146.112.0/23AS28745'

route:          83.146.112.0/23
descr:          SUTTK-ORB
origin:         AS28745
mnt-by:         SUTTK-MNT
created:        2013-05-27T03:58:53Z
last-modified:  2022-06-17T09:07:23Z
source:         RIPE

% 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