% 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 'AS51357 - AS52223'

as-block:       AS51357 - AS52223
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:        2021-12-09T08:21:17Z
last-modified:  2021-12-09T08:21:17Z
source:         RIPE

% Information related to 'AS51803'

% Abuse contact for 'AS51803' is 'ipplusinfo@gmail.com'

aut-num:        AS51803
as-name:        IPPLUS
org:            ORG-ISPL7-RIPE
sponsoring-org: ORG-DL91-RIPE
import:         from AS35297 accept ANY
export:         to AS35297 announce AS51803
import:         from AS3255 accept ANY
export:         to AS3255 announce AS51803
import:         from AS49824 accept ANY
export:         to AS49824 announce AS51803
import:         from AS59577 accept ANY
export:         to AS59577 announce AS51803
admin-c:        AK18440-RIPE
tech-c:         AK18440-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         DL-MNT
created:        2021-09-17T13:21:19Z
last-modified:  2023-07-20T14:06:25Z
source:         RIPE

organisation:   ORG-ISPL7-RIPE
org-name:       Info Space Plus Ltd.
country:        UA
org-type:       OTHER
phone:          +380632200202
address:        22A Hrushevskeho st.,  Vynnyky, Lviv region, Ukraine
admin-c:        ISPL8-RIPE
tech-c:         ISPL8-RIPE
abuse-c:        ISPL8-RIPE
mnt-ref:        RIPE-DB-MNT
mnt-by:         RIPE-DB-MNT
created:        2021-09-10T11:36:39Z
last-modified:  2022-12-01T17:15:38Z
source:         RIPE # Filtered

person:         Andrey Koba
org:            ORG-DL91-RIPE
address:        Solomenskaya square, 2, office 705
address:        Kyiv 03035, Ukraine
phone:          +380443736868
phone:          +380676160714
nic-hdl:        AK18440-RIPE
mnt-by:         AK-MNT
created:        2017-10-18T08:39:02Z
last-modified:  2020-06-01T15:04:19Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.113.2 (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