% 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 'AS43075 - AS44168'

as-block:       AS43075 - AS44168
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:        2023-12-11T15:09:58Z
last-modified:  2023-12-11T15:09:58Z
source:         RIPE

% Information related to 'AS43503'

% Abuse contact for 'AS43503' is 'abuse@herbst.de'

aut-num:        AS43503
as-name:        HERBST-AS
org:            ORG-HDG4-RIPE
remarks:
import:         from AS8928 accept ANY
export:         to AS8928 announce AS43503
remarks:
import:         from AS13237 accept ANY
export:         to AS13237 announce AS-HERBST
remarks:
import:         from AS15366 accept ANY
export:         to AS15366 announce AS-HERBST
remarks:
import:         from AS16374 accept AS-BCIX
export:         to AS16374 announce AS-HERBST
remarks:
admin-c:        PH2793-RIPE
tech-c:         PH2793-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         HERBST-MNT
created:        2007-08-13T09:33:21Z
last-modified:  2019-08-07T14:05:46Z
source:         RIPE

organisation:   ORG-HDG4-RIPE
org-name:       Herbst Datentechnik GmbH
country:        DE
org-type:       LIR
address:        Philippistrasse 10
address:        14059
address:        Berlin
address:        GERMANY
phone:          +493078890530
fax-no:         +493078890559
abuse-c:        HA2716-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        HERBST-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         HERBST-MNT
created:        2009-08-28T10:30:49Z
last-modified:  2020-12-16T13:14:02Z
source:         RIPE # Filtered

person:         Patrick Herbst
address:        Herbst Datentechnik GmbH
address:        Philippistr. 10
address:        14059 Berlin
phone:          +49 30 78 89 05 30
fax-no:         +49 30 78 89 05 59
nic-hdl:        PH2793-RIPE
mnt-by:         HERBST-MNT
created:        2005-11-16T15:47:21Z
last-modified:  2012-05-25T11:20:26Z
source:         RIPE # Filtered

% 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