% 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 '88.208.188.8 - 88.208.188.11'

% Abuse contact for '88.208.188.8 - 88.208.188.11' is 'abuse@helinet.de'

inetnum:        88.208.188.8 - 88.208.188.11
netname:        GSF-FROE-NET
descr:          Gesamtschule Froendenberg
descr:          Im Wiesengrund 7
descr:          D-58730 Froendenberg
country:        DE
admin-c:        GG17145-RIPE
tech-c:         GG17145-RIPE
status:         ASSIGNED PA
mnt-by:         AS12355-MNT
mnt-lower:      AS12355-MNT
mnt-routes:     AS12355-MNT
created:        2018-12-14T14:14:17Z
last-modified:  2018-12-14T14:14:17Z
source:         RIPE # Filtered

person:         Gernot Geitz
address:        Stadt Froendenberg
address:        Bahnhofstrasse 2
address:        D-58730 Froendenberg
phone:          +49 2373 976 208
nic-hdl:        GG17145-RIPE
mnt-by:         AS12355-MNT
created:        2018-12-14T14:14:17Z
last-modified:  2018-12-14T14:14:17Z
source:         RIPE # Filtered

% Information related to '88.208.160.0/19AS12355'

route:          88.208.160.0/19
descr:          HeLi NET Telekommunikation GmbH & Co. KG
descr:          Hamm, Germany
origin:         AS12355
mnt-by:         AS12355-MNT
created:        2009-05-05T08:28:37Z
last-modified:  2009-05-05T08:28:37Z
source:         RIPE # Filtered

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

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