% 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 '89.233.144.112 - 89.233.144.119'

% Abuse contact for '89.233.144.112 - 89.233.144.119' is 'abuse@t-mobile.cz'

inetnum:        89.233.144.112 - 89.233.144.119
org:            ORG-BIoB1-RIPE
netname:        BIVS-NET
descr:          Banking Institute/College of Banking (BICB)
country:        CZ
admin-c:        JR953-RIPE
tech-c:         JR953-RIPE
status:         ASSIGNED PA
mnt-by:         PRAGONET-MNT
created:        2008-07-02T22:38:06Z
last-modified:  2008-07-02T22:38:06Z
source:         RIPE # Filtered

organisation:   ORG-BIoB1-RIPE
org-name:       Banking Institute/College of Banking (BICB)
org-type:       OTHER
address:        Narozni 9/2600
address:        15800, Praha 13
address:        The Czech Republic
mnt-ref:        PRAGONET-MNT
mnt-by:         PRAGONET-MNT
created:        2008-07-02T22:26:10Z
last-modified:  2008-07-02T22:26:10Z
source:         RIPE # Filtered

person:         Jan Rydrych
org:            ORG-BIoB1-RIPE
address:        Narozni 9/2600
address:        15800, Praha 13
address:        The Czech Republic
phone:          +420 731 425 278
nic-hdl:        JR953-RIPE
created:        2008-07-02T22:31:45Z
last-modified:  2020-06-04T10:57:50Z
source:         RIPE # Filtered
mnt-by:         AS13036-MNT

% Information related to '89.233.128.0/18AS12767'

route:          89.233.128.0/18
descr:          AS-PRAGONET aggregate
member-of:      AS12767:RS-PA-PRAGONET
origin:         AS12767
mnt-by:         AS12767-MNT
created:        2006-05-16T13:45:10Z
last-modified:  2016-09-25T16:22:28Z
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