% 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 '212.23.229.72 - 212.23.229.79'

% Abuse contact for '212.23.229.72 - 212.23.229.79' is 'abuse@colt.net'

inetnum:        212.23.229.72 - 212.23.229.79
netname:        NET-CH-ZEBROLFESSCHIERENBECKASSOCIATES-GMBH
descr:          zeb/rolfes.schierenbeck.associates gmbh
country:        CH
admin-c:        SS30191-RIPE
tech-c:         CC132-RIPE
status:         ASSIGNED PA
mnt-by:         COLT-CH-MNT
created:        2016-08-24T13:55:17Z
last-modified:  2016-08-24T13:55:17Z
source:         RIPE

role:           Shkelzen Gjihollaj
address:        JTC
address:        Beethovenstrasse, 21, 8002, Zurich, Switzerland
phone:          +41 43883111
nic-hdl:        CC132-RIPE
mnt-by:         COLT-CH-MNT
created:        2002-08-30T13:51:37Z
last-modified:  2024-07-02T12:22:34Z
source:         RIPE # Filtered

person:         SVEN SCHOENFELDER
address:        zeb/rolfes.schierenbeck.associates gmbh
address:        GUTENBERGSTRASSE-1
address:        ZURICH, 8002,Switzerland
phone:          +492419660372
nic-hdl:        SS30191-RIPE
mnt-by:         COLT-CH-MNT
created:        2016-08-24T13:55:16Z
last-modified:  2016-08-24T13:55:16Z
source:         RIPE

% Information related to '212.23.224.0/19AS8220'

route:          212.23.224.0/19
descr:          COLT Internet CH
origin:         AS8220
mnt-by:         COLT-CH-MNT
created:        2003-08-07T11:25:18Z
last-modified:  2003-08-07T11:25:18Z
source:         RIPE

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