% 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 '82.212.252.72 - 82.212.252.79'

% Abuse contact for '82.212.252.72 - 82.212.252.79' is 'abuse@iwelt-ag.net'

inetnum:        82.212.252.72 - 82.212.252.79
netname:        MGG-NET
descr:          Matthias-Grünewald-Gymnasium
descr:          Zwerchgraben 1
descr:          97074 Würzburg
country:        DE
admin-c:        ODMS2-RIPE
tech-c:         MR465-RIPE
status:         ASSIGNED PA
mnt-by:         IWELT-MNT
created:        2019-09-10T08:51:53Z
last-modified:  2019-09-10T08:51:53Z
source:         RIPE

person:         Martin Raab
address:        iWelt GmbH + Co. KG
address:        Mainparkring 4
address:        97246 Eibelstadt
address:        Germany
phone:          +49 9303 982 800
fax-no:         +49 9303 982 879
nic-hdl:        MR465-RIPE
mnt-by:         IWELT-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2020-09-17T06:19:39Z
source:         RIPE # Filtered

person:         OStD Dr. Martin Sachse-Weinert
address:        Matthias-Grünewald-Gymnasium
address:        Zwerchgraben 1
address:        97074 Würzburg
address:        Germany
phone:          +49 931 797530
nic-hdl:        ODMS2-RIPE
mnt-by:         IWELT-MNT
created:        2019-09-10T08:49:11Z
last-modified:  2019-09-10T08:49:58Z
source:         RIPE # Filtered

% Information related to '82.212.252.0/24AS13289'

route:          82.212.252.0/24
descr:          iWelt GmbH + Co. KG - Net
descr:          prefix only advertised in case of DDoS
origin:         AS13289
mnt-by:         IWELT-MNT
created:        2017-11-21T09:57:15Z
last-modified:  2020-10-14T10:20:48Z
source:         RIPE

% 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