% 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://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '217.198.240.0 - 217.198.255.255'

% Abuse contact for '217.198.240.0 - 217.198.255.255' is 'abuse@Uni-Mainz.DE'

inetnum:        217.198.240.0 - 217.198.255.255
netname:        DE-RLP-NET-20041119
country:        DE
org:            ORG-JGM3-RIPE
admin-c:        JW24-RIPE
tech-c:         NUM1-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS2857-MNT
mnt-routes:     AS2857-MNT
mnt-domains:    AS2857-MNT
created:        2004-11-19T10:26:00Z
last-modified:  2017-02-20T10:42:31Z
source:         RIPE # Filtered

organisation:   ORG-JGM3-RIPE
org-name:       Johannes Gutenberg-Universitaet Mainz
country:        DE
org-type:       LIR
address:        ANSELM-FRANZ-VON-BENTZEL WEG 12
address:        55099
address:        MAINZ
address:        GERMANY
phone:          +4961313926361
fax-no:         +4961313926407
admin-c:        JW24-RIPE
admin-c:        FN
mnt-ref:        AS2857-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS2857-MNT
abuse-c:        NUM1-RIPE
created:        2004-11-04T06:11:22Z
last-modified:  2020-12-16T13:05:52Z
source:         RIPE # Filtered

role:           NOC Uni Mainz
address:        Johannes Gutenberg-Universitaet
address:        Zentrum fuer Datenverarbeitung
address:        Saarstrasse 21
address:        D-55099 Mainz
address:        Germany
phone:          +49 6131 39 26300
fax-no:         +49 6131 39 26407
remarks:        for Information: http://www.zdv.Uni-Mainz.DE
abuse-mailbox:  abuse@Uni-Mainz.DE
admin-c:        FN
tech-c:         FN
tech-c:         JW24-RIPE
nic-hdl:        NUM1-RIPE
mnt-by:         AS2857-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2005-11-15T10:08:35Z
source:         RIPE # Filtered

person:         Juergen Weiss
address:        Johannes Gutenberg-Universitaet
address:        Zentrum fuer Datenverarbeitung
address:        Saarstrasse 21
address:        D-55099 Mainz
address:        Germany
phone:          +49 6131 39 26361
fax-no:         +49 6131 39 26407
nic-hdl:        JW24-RIPE
mnt-by:         AS2857-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2001-09-22T03:32:09Z
source:         RIPE # Filtered

% Information related to '217.198.240.0/20AS2857'

route:          217.198.240.0/20
descr:          DE-RLP-NET
origin:         AS2857
mnt-by:         AS2857-MNT
created:        2005-08-10T14:38:51Z
last-modified:  2005-08-10T14:38:51Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.114 (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