% 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 '5.35.152.0 - 5.35.159.255'

% Abuse contact for '5.35.152.0 - 5.35.159.255' is 'abuse@irtelcom.ru'

inetnum:        5.35.152.0 - 5.35.159.255
netname:        IRTELCOM-NET
descr:          ISP Irtelcom Ltd.
country:        RU
admin-c:        TRD2-RIPE
tech-c:         TRD2-RIPE
status:         ASSIGNED PA
mnt-by:         IRTELCOM-MNT
mnt-lower:      IRTELCOM-MNT
mnt-routes:     IRTELCOM-MNT
created:        2013-05-28T13:03:45Z
last-modified:  2013-05-28T13:03:45Z
source:         RIPE

person:         Taimuraz R Dzesov
address:        Global Alania
address:        2A Kalinina st. Vladikavkaz, Russia, 362031
phone:          +7 8672 402700
nic-hdl:        TRD2-RIPE
mnt-by:         IRTELCOM-MNT
created:        2003-04-01T11:39:41Z
last-modified:  2016-10-07T12:11:16Z
source:         RIPE # Filtered

% Information related to '5.35.144.0/20AS43530'

route:          5.35.144.0/20
descr:          Irtelcom LLC
origin:         AS43530
mnt-by:         IRTELCOM-MNT
created:        2020-04-01T15:18:10Z
last-modified:  2020-04-01T15:18:10Z
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