% 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 'AS47870 - AS50218'

as-block:       AS47870 - AS50218
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2024-07-08T14:18:48Z
last-modified:  2024-07-08T14:18:48Z
source:         RIPE

% Information related to 'AS49764'

% Abuse contact for 'AS49764' is 'abuse@rt.ru'

aut-num:        AS49764
as-name:        SKSTROI-AS
org:            ORG-SL719-RIPE
import:         from AS3217 accept ANY
export:         to AS3217 announce AS49764
import:         from AS12389 accept ANY
export:         to AS12389 announce AS49764
import:         from AS20485 accept ANY
export:         to AS20485 announce AS49764
sponsoring-org: ORG-JR8-RIPE
admin-c:        DN3830-RIPE
tech-c:         DN3830-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         mnt-ru-avantelspb-1
created:        2018-02-20T14:21:32Z
last-modified:  2021-05-04T08:26:23Z
source:         RIPE

organisation:   ORG-SL719-RIPE
org-name:       SKSTROI LLC
country:        RU
org-type:       OTHER
address:        51, Krymova, Ulyanovsk, Russia, 432071
abuse-c:        AR42781-RIPE
mnt-ref:        mnt-ru-avantelspb-1
mnt-by:         mnt-ru-avantelspb-1
created:        2018-02-16T13:16:33Z
last-modified:  2022-12-01T17:26:09Z
source:         RIPE # Filtered

person:         Dmitry Narutsky
address:        Krymova, 51
address:        432071
address:        Ulyanovsk
address:        RUSSIAN FEDERATION
phone:          +78422411141
nic-hdl:        DN3830-RIPE
mnt-by:         ru-ul-1-mnt
created:        2017-08-18T07:20:29Z
last-modified:  2017-08-18T07:20:29Z
source:         RIPE

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

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