% 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 '217.68.80.0 - 217.68.83.255'

% Abuse contact for '217.68.80.0 - 217.68.83.255' is 'net@hep.hr'

inetnum:        217.68.80.0 - 217.68.83.255
netname:        HEPNET
descr:          PROVIDER Local Registry
descr:          HEP d.d.
country:        HR
admin-c:        NM6619-RIPE
admin-c:        MM44834-RIPE
tech-c:         NM6619-RIPE
tech-c:         MM44834-RIPE
status:         ASSIGNED PA
mnt-by:         HEP-MNT
mnt-by:         mnt-heptk
created:        2003-10-15T12:51:30Z
last-modified:  2016-12-28T08:30:01Z
source:         RIPE # Filtered

person:         Marko Muzar
address:        Ulica grada Vukovara 37, 10000 Zagreb, Croatia
phone:          +385 1 6322 891
nic-hdl:        MM44834-RIPE
mnt-by:         mnt-mamuzar
created:        2016-09-21T13:04:41Z
last-modified:  2023-01-04T13:21:26Z
source:         RIPE # Filtered

person:         Neven Milinovic
address:        Ulica grada Vukovara 37, 10000 Zagreb, Croatia
phone:          +385 98 9824 034
nic-hdl:        NM6619-RIPE
mnt-by:         mnt-nmilinovic
created:        2016-09-21T13:41:59Z
last-modified:  2016-09-21T13:41:59Z
source:         RIPE

% Information related to '217.68.80.0/23AS25328'

route:          217.68.80.0/23
origin:         AS25328
mnt-by:         mnt-heptk
mnt-by:         HEP-MNT
mnt-by:         mnt-mamuzar
created:        2016-12-28T10:33:19Z
last-modified:  2016-12-28T10:33:19Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.123 (SHETLAND)