% 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 '83.21.0.0 - 83.21.255.255'

% Abuse contact for '83.21.0.0 - 83.21.255.255' is 'cert.opl@orange.com'

inetnum:        83.21.0.0 - 83.21.255.255
netname:        Orange-Swiatlowod
descr:          Orange Swiatlowod
country:        PL
language:       PL
remarks:        -----------------------------
remarks:        Contact to CERT OPL
remarks:        cert.opl@orange.com
remarks:        -----------------------------
admin-c:        OPHT
tech-c:         OPHT
status:         SUB-ALLOCATED PA
mnt-by:         TPNET
created:        2022-03-18T10:51:20Z
last-modified:  2022-03-18T10:51:20Z
source:         RIPE

role:           OPL - Hostmaster
address:        Orange Polska S.A.
address:        Al. Jerozolimskie 160
address:        02-326 Warszawa
address:        Poland
phone:          +48 800 120810
phone:          +48 801 600006
phone:          +48 22 5039000
fax-no:         +48 22 6225182
org:            ORG-PT1-RIPE
admin-c:        EHD2-RIPE
tech-c:         KP21-RIPE
abuse-mailbox:  cert.opl@orange.com
nic-hdl:        OPHT
mnt-by:         TPNET
created:        2014-03-26T08:23:42Z
last-modified:  2022-10-13T08:13:33Z
source:         RIPE # Filtered

% Information related to '83.16.0.0/13AS5617'

route:          83.16.0.0/13
descr:          TPNET
descr:          for abuse: abuse@tpnet.pl
origin:         AS5617
mnt-by:         AS5617-MNT
created:        2006-12-19T13:53:21Z
last-modified:  2006-12-19T13:53:21Z
source:         RIPE

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