% 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 '217.243.175.48 - 217.243.175.55'

% Abuse contact for '217.243.175.48 - 217.243.175.55' is 'auftrag@nic.telekom.de'

inetnum:        217.243.175.48 - 217.243.175.55
netname:        ALFATRAINING-BILDUNGSZENTRUM-KARLSRUHE-NET
descr:          alfatraining Bildungszentrum e.K.
country:        DE
admin-c:        TK6331-RIPE
tech-c:         DK7904-RIPE
status:         ASSIGNED PA
mnt-by:         DTAG-NIC
created:        2011-01-28T07:35:19Z
last-modified:  2016-09-27T11:36:43Z
source:         RIPE # Filtered

person:         Dennis Kessler
address:        alfatraining Bildungszentrum e. K.
address:        Kriegsstr. 100
address:        76133 Karlsruhe
address:        Deutschland
phone:          +49 681 89197920
mnt-by:         DTAG-NIC
nic-hdl:        DK7904-RIPE
created:        2016-09-05T07:33:46Z
last-modified:  2016-09-05T07:36:21Z
source:         RIPE # Filtered

person:         Thomas Kolling
address:        alfatraining Bildungszentrum e.K.
address:        Bertha-v.-Suttner-Str.
address:        D-66123 Saarbruecken
phone:          +49 681 89197921
fax-no:         +49 681 89197919
mnt-by:         ENVIA-TEL-MNT
nic-hdl:        TK6331-RIPE
created:        2015-01-28T10:06:42Z
last-modified:  2015-01-28T10:06:42Z
source:         RIPE # Filtered

% Information related to '217.224.0.0/11AS3320'

route:          217.224.0.0/11
descr:          Deutsche Telekom AG, Internet service provider
origin:         AS3320
member-of:      AS3320:RS-PA-TELEKOM
mnt-by:         DTAG-RR
created:        1970-01-01T00:00:00Z
last-modified:  2004-06-15T17:32:54Z
source:         RIPE

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

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