% 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 '188.163.81.0 - 188.163.81.255'

% Abuse contact for '188.163.81.0 - 188.163.81.255' is 'abuse@kyivstar.net'

inetnum:        188.163.81.0 - 188.163.81.255
netname:        DHCP-FTTB-OD-188-163-81-GTUA
descr:          Golden Telecom
country:        UA
org:            ORG-SOGT1-RIPE
admin-c:        GTUA-RIPE
tech-c:         GTUA-RIPE
status:         ASSIGNED PA
mnt-by:         GTUA-MNT
mnt-lower:      GTUA-WO-MNT
mnt-domains:    GTUA-ZONE-MNT
mnt-routes:     GTUA-RT-MNT
created:        2009-11-04T13:48:33Z
last-modified:  2009-11-04T13:48:33Z
source:         RIPE

organisation:   ORG-SOGT1-RIPE
org-name:       Golden Telecom LLC
org-type:       Other
address:        15/15/6 V. Khvojki str.
address:        04080
address:        Kiev
address:        UKRAINE
phone:          +380444900000
fax-no:         +380444900048
admin-c:        AEL17-RIPE
admin-c:        NP1533-RIPE
mnt-ref:        GTUA-MNT
mnt-ref:        GTUA-MNT
mnt-by:         GTUA-MNT
abuse-c:        GTL6-RIPE
created:        2004-04-17T12:09:58Z
last-modified:  2021-02-15T13:08:39Z
source:         RIPE # Filtered

role:           Golden Telecom Ukraine NOC
address:        Golden Telecom
address:        4 Lepse blvr
address:        Kiev, 03067, Ukraine
phone:          +380 44 4900000
fax-no:         +380 44 4900048
remarks:        All abuse notifications have to be sent on:
abuse-mailbox:  abuse@kyivstar.net
admin-c:        AEL17-RIPE
admin-c:        NP1533-RIPE
nic-hdl:        GTUA-RIPE
mnt-by:         GTUA-MNT
created:        2007-07-25T09:02:04Z
last-modified:  2014-06-17T08:24:26Z
source:         RIPE # Filtered

% Information related to '188.163.64.0/18AS15895'

route:          188.163.64.0/18
descr:          Kyivstar GSM, Kiev, Ukraine
origin:         AS15895
mnt-by:         KYIVSTAR-MNT
created:        2013-10-22T12:05:44Z
last-modified:  2013-10-22T12:05:44Z
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