% 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 '185.68.28.0 - 185.68.31.255'

% Abuse contact for '185.68.28.0 - 185.68.31.255' is 'abuse@kr-plzensky.cz'

inetnum:        185.68.28.0 - 185.68.31.255
netname:        CZ-PLZENSKYKRAJ-20140825
country:        CZ
org:            ORG-PK29-RIPE
admin-c:        jp549-RIPE
admin-c:        KUPK2-RIPE
tech-c:         jp549-RIPE
tech-c:         KUPK2-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         kupk-sieber
mnt-lower:      PLZ-MNT
mnt-lower:      kupk-sieber
mnt-routes:     PLZ-MNT
created:        2014-08-25T12:55:21Z
last-modified:  2017-03-31T06:52:56Z
source:         RIPE

organisation:   ORG-PK29-RIPE
org-name:       Plzensky kraj
country:        CZ
org-type:       LIR
address:        Skroupova 18
address:        31613
address:        Plzen
address:        CZECH REPUBLIC
phone:          +420777353655
abuse-c:        KUPK2-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        kupk-sieber
mnt-ref:        TENCZ-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         kupk-sieber
created:        2014-07-22T14:05:48Z
last-modified:  2020-12-16T12:45:22Z
source:         RIPE # Filtered

role:           Krajsky urad Plzenskeho kraje Network Admins
address:        Krajsky urad Plzenskeho kraje
address:        Skroupova 18
address:        Plzen
address:        306 13
address:        The Czech Republic
phone:          +420 377 195 666
fax-no:         +420 377 195 208
abuse-mailbox:  abuse@kr-plzensky.cz
org:            ORG-PK29-RIPE
admin-c:        JL3437-RIPE
admin-c:        JP549-RIPE
tech-c:         JL3437-RIPE
tech-c:         JP549-RIPE
nic-hdl:        KUPK2-RIPE
mnt-by:         TENCZ-MNT
mnt-by:         PLZ-MNT
created:        2014-09-05T10:45:06Z
last-modified:  2017-08-07T16:29:06Z
source:         RIPE # Filtered

person:         Jan Pejchal
address:        Krajska zdravotni, a.s.
address:        Socialni pece 3316/12A
address:        Usti nad Labem
address:        401 13
address:        The Czech Republic
phone:          +420 477 114 102
phone:          +420 603 155 974
nic-hdl:        JP549-RIPE
mnt-by:         TENCZ-MNT
created:        2002-09-20T15:23:18Z
last-modified:  2023-08-25T10:38:44Z
source:         RIPE # Filtered

% Information related to '185.68.28.0/22AS201648'

route:          185.68.28.0/22
descr:          IP address space Plzensky kraj
origin:         AS201648
mnt-by:         PLZ-MNT
created:        2014-08-27T22:28:55Z
last-modified:  2014-08-27T22:28:55Z
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