% 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 '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 'AS51504'

% Abuse contact for 'AS51504' is 'abuse@telset.ee'

aut-num:        AS51504
as-name:        Telset
org:            ORG-Tl54-RIPE
import:         from AS39301 81.21.245.2 accept ANY
import:         from AS39301 81.21.245.1 accept ANY
import:         from AS3327 212.47.215.222 accept ANY
export:         to AS39301 81.21.245.2 announce AS51504
export:         to AS39301 81.21.245.1 announce AS51504
export:         to AS3327 212.47.215.222 announce AS51504
admin-c:        TN3711-RIPE
tech-c:         TN3711-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-TELSET
created:        2010-09-13T10:39:02Z
last-modified:  2021-07-22T11:49:28Z
source:         RIPE # Filtered

organisation:   ORG-TL54-RIPE
org-name:       AS Telset
country:        EE
org-type:       LIR
address:        Qismae Tee 57A
address:        13515
address:        Tallinn
address:        ESTONIA
phone:          +3725030444
phone:          +37255697986
fax-no:         +3726571102
abuse-c:        AR14857-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        TELSET-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         TELSET-MNT
admin-c:        TN3711-RIPE
created:        2006-02-21T08:36:13Z
last-modified:  2023-04-11T09:22:55Z
source:         RIPE # Filtered

person:         Timur Nikishin
address:        Oismae tee 57A, Tallinn, Estonia
phone:          +37255697986
nic-hdl:        TN3711-RIPE
mnt-by:         TELSET-MNT
created:        2018-03-17T14:35:21Z
last-modified:  2018-03-17T14:47:47Z
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