% 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 '143.245.0.0 - 143.245.255.255'

% Abuse contact for '143.245.0.0 - 143.245.255.255' is 'net-admin@oekb.at'

inetnum:        143.245.0.0 - 143.245.255.255
netname:        OEKBLAN
country:        AT
org:            ORG-OKA6-RIPE
admin-c:        EJ63
tech-c:         OEKB1-RIPE
status:         LEGACY
mnt-by:         RIPE-NCC-LEGACY-MNT
mnt-by:         OEKB-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2019-11-07T16:22:04Z
source:         RIPE
sponsoring-org: ORG-NLTU1-RIPE

organisation:   ORG-OKA6-RIPE
org-name:       Oesterreichische Kontrollbank Aktiengesellschaft
country:        AT
org-type:       OTHER
address:        Strauchgasse 3
address:        1010 Vienna
address:        Austria
abuse-c:        AR21593-RIPE
mnt-ref:        AS1764-MNT
mnt-by:         AS1764-MNT
mnt-by:         OEKB-MNT
created:        2011-04-21T11:44:40Z
last-modified:  2022-12-01T17:03:43Z
source:         RIPE # Filtered

role:           OEKB Netadmin
address:        Oesterr. Kontrollbank AG
address:        attn. IT Dept.
address:        Strauchgasse 1-3
address:        A-1010 Wien
address:        Austria
phone:          +43 1 53127-1111
fax-no:         +43 1 53127-5243
admin-c:        EJ63
tech-c:         EJ63
nic-hdl:        OEKB1-RIPE
mnt-by:         OEKB-MNT
created:        2003-06-02T13:29:10Z
last-modified:  2019-11-07T16:22:53Z
source:         RIPE # Filtered

person:         Ewald Jenisch
address:        Oesterr. Kontrollbank AG
address:        attn. IT Dept.
address:        Strauchgasse 1-3
address:        A-1010 Wien
phone:          +43 1 53127-2175
fax-no:         +43 1 53127-4175
nic-hdl:        EJ63
mnt-by:         EJ-MNT
remarks:        formerly Vienna University, Austria <Ewald.Jenisch@univie.ac.at>
created:        2002-02-07T07:39:54Z
last-modified:  2019-11-07T16:21:12Z
source:         RIPE # Filtered

% Information related to '143.245.0.0/16AS21079'

route:          143.245.0.0/16
descr:          OEKBLAN
origin:         AS21079
mnt-by:         OEKB-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2003-05-26T11:40:41Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.111 (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