% 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 'AS21392 - AS21451'

as-block:       AS21392 - AS21451
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:        2018-11-22T15:27:28Z
last-modified:  2018-11-22T15:27:28Z
source:         RIPE

% Information related to 'AS21405'

% Abuse contact for 'AS21405' is 'FMB.TS-CHE-CSNET@t-systems.com'

aut-num:        AS21405
as-name:        TSS1
org:            ORG-TSA108-RIPE
import:         from AS6830 accept any
import:         from AS6730 accept any
export:         to AS6830 announce AS21405
export:         to AS6730 announce AS21405
admin-c:        TZN2-RIPE
tech-c:         TZN2-RIPE
remarks:
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         TSS-CH-MNT
mnt-by:         AS21405-MNT
created:        2001-11-29T20:23:01Z
last-modified:  2023-02-20T08:38:32Z
source:         RIPE # Filtered

organisation:   ORG-TSA108-RIPE
org-name:       T-Systems Schweiz AG
country:        CH
org-type:       LIR
address:        Industriestrasse 21
address:        3052
address:        Zollikofen
address:        SWITZERLAND
phone:          +41 848 11 22 11
admin-c:        NH718-RIPE
admin-c:        MN2365-RIPE
admin-c:        SL14734-RIPE
tech-c:         NH718-RIPE
tech-c:         MN2365-RIPE
abuse-c:        AR36476-RIPE
mnt-ref:        TSS-CH-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         TSS-CH-MNT
created:        2016-05-20T13:12:16Z
last-modified:  2022-10-10T07:51:04Z
source:         RIPE # Filtered

role:           TZN1ROSW Role
address:        TSS Switzerland
admin-c:        NH718-RIPE
admin-c:        sl14734-ripe
tech-c:         NH718-RIPE
tech-c:         MN2365-RIPE
nic-hdl:        TZN2-RIPE
mnt-by:         TSS-CH-MNT
created:        2005-08-16T12:12:30Z
last-modified:  2023-02-20T08:29:20Z
source:         RIPE # Filtered

% 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