% 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 '83.143.32.0 - 83.143.39.255'

% Abuse contact for '83.143.32.0 - 83.143.39.255' is 'naproshkina@gmail.com'

inetnum:        83.143.32.0 - 83.143.39.255
netname:        SIGMA-NET
country:        RU
org:            ORG-SL233-RIPE
admin-c:        NP4457-RIPE
tech-c:         NP4457-RIPE
status:         ASSIGNED PI
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         SIGMATEL-MNT
mnt-routes:     SIGMATEL-MNT
mnt-domains:    SIGMATEL-MNT
created:        2009-06-30T12:44:45Z
last-modified:  2022-04-28T07:35:14Z
source:         RIPE
sponsoring-org: ORG-CS216-RIPE

organisation:   ORG-SL233-RIPE
org-name:       SigmaTelecom Ltd
country:        RU
org-type:       OTHER
address:        Leninskogo Komsomola, 28
address:        Sosnovoborsk, 662501, Russia
abuse-c:        AR27557-RIPE
mnt-ref:        SIGMATEL-MNT
mnt-by:         SIGMATEL-MNT
created:        2009-06-29T23:38:29Z
last-modified:  2022-12-01T16:52:13Z
source:         RIPE # Filtered

person:         Nina Proshkina
address:        SigmaTelecom Ltd.
phone:          +73913122924
nic-hdl:        NP4457-RIPE
mnt-by:         SIGMATEL-MNT
created:        2017-07-19T09:55:30Z
last-modified:  2017-07-19T09:55:30Z
source:         RIPE

% Information related to '83.143.32.0/22AS196812'

route:          83.143.32.0/22
descr:          RU-SIGMA-TELECOM-20090720
origin:         AS196812
mnt-by:         SIGMATEL-MNT
created:        2016-06-07T04:17:33Z
last-modified:  2016-06-07T04:17:33Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.112 (DEXTER)

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