% 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 '213.173.72.73 - 213.173.95.255'

% Abuse contact for '213.173.72.73 - 213.173.95.255' is 'support@bkdat.net'

inetnum:        213.173.72.73 - 213.173.95.255
netname:        BKDAT2
descr:          BK DAT Cable Provider
country:        AT
tech-c:         MH2781-RIPE
admin-c:        MH2781-RIPE
tech-c:         WH3749-RIPE
status:         ASSIGNED PA
mnt-by:         AS13292-MNT
mnt-lower:      AS13292-MNT
mnt-routes:     AS13292-MNT
created:        2009-07-10T10:01:51Z
last-modified:  2023-06-07T09:38:48Z
source:         RIPE

person:         Markus Hambammer
address:        BKDAT
address:        Hieflauerstrasse 20
address:        A-8790 Eisenerz
address:        Austria
phone:          +43 3848 600 48
fax-no:         +43 3848 600 58
nic-hdl:        MH2781-RIPE
created:        2003-01-12T10:19:53Z
last-modified:  2016-04-06T05:24:03Z
mnt-by:         RIPE-NCC-LOCKED-MNT
source:         RIPE # Filtered

person:         Willi Hambammer
address:        BK DAT
address:        Hieflauerstrasse 20
address:        A-8790 Eisenerz
address:        Austria
phone:          +43 3848 600 48
fax-no:         +43 3848 60058
nic-hdl:        WH3749-RIPE
created:        1970-01-01T00:00:00Z
last-modified:  2020-06-04T10:55:15Z
source:         RIPE # Filtered
mnt-by:         AS13292-MNT

% Information related to '213.173.64.0/19AS13292'

route:          213.173.64.0/19
descr:          BK DAT
origin:         AS13292
mnt-by:         AS13292-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2001-09-22T09:33:21Z
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