% 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 '5.39.189.0 - 5.39.189.255'

% Abuse contact for '5.39.189.0 - 5.39.189.255' is 'abuse@colocenter.nl'

inetnum:        5.39.189.0 - 5.39.189.255
netname:        NL-COLOCENTER
org:            ORG-Cb42-RIPE
descr:          ColoCenter b.v.
country:        NL
admin-c:        AL9611-RIPE
tech-c:         AL9611-RIPE
status:         ASSIGNED PA
mnt-by:         MNT-COLO
created:        2012-11-26T21:17:26Z
last-modified:  2018-12-28T21:11:25Z
source:         RIPE

organisation:   ORG-Cb42-RIPE
org-name:       ColoCenter b.v.
country:        NL
org-type:       LIR
address:        Heliumstraat 200
address:        2718 RS
address:        Rotterdam
address:        NETHERLANDS
phone:          +31797113500
abuse-c:        AR16150-RIPE
tech-c:         MK23096-RIPE
admin-c:        AL9611-RIPE
mnt-ref:        mnt-colo
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MNT-COLO
created:        2012-05-10T08:57:35Z
last-modified:  2024-04-29T10:31:56Z
source:         RIPE # Filtered

person:         Alexander Lantink
address:        Hofplein 33
address:        3011AJ Rotterdam
address:        The Netherlands
phone:          +31797113500
nic-hdl:        AL9611-RIPE
mnt-by:         A_Lantink
created:        2012-05-10T09:53:51Z
last-modified:  2018-12-28T21:10:03Z
source:         RIPE # Filtered

% Information related to '5.39.189.0/24AS58291'

route:          5.39.189.0/24
descr:          Route for AS58291
origin:         AS58291
mnt-by:         mnt-colo
created:        2013-07-25T15:58:02Z
last-modified:  2013-07-25T15:58:02Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.113.2 (BUSA)

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