% 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 '212.6.128.0 - 212.6.255.255'

% Abuse contact for '212.6.128.0 - 212.6.255.255' is 'abuse@claranet.de'

inetnum:        212.6.128.0 - 212.6.255.255
org:            ORG-CG4-RIPE
netname:        DE-CLARANET-980428
country:        DE
admin-c:        MB25544-RIPE
tech-c:         CH7011-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         CLARANETDE-MNT
mnt-routes:     CLARANETDE-MNT
created:        2002-09-20T09:02:26Z
last-modified:  2020-01-27T15:26:28Z
source:         RIPE # Filtered

organisation:   ORG-CG4-RIPE
org-name:       Claranet Gmbh
country:        DE
org-type:       LIR
address:        Hanauer Landstrasse 196
address:        60314
address:        Frankfurt/Main
address:        GERMANY
phone:          +4969408018300
fax-no:         +4969408018279
admin-c:        MB25544-RIPE
admin-c:        JM6145-RIPE
admin-c:        DJF
mnt-ref:        CLARANETDE-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         CLARANETDE-MNT
abuse-c:        ABCN-RIPE
created:        2004-04-17T11:06:05Z
last-modified:  2020-12-16T13:30:41Z
source:         RIPE # Filtered

role:           Claranet De Hostmaster
address:        ClaraNET Gmbh
address:        Frankfurt, Germany
phone:          +49 (0) 69 408018-0
fax-no:         +49 (0) 69 408018-100
admin-c:        MB25544-RIPE
tech-c:         CH7011-RIPE
nic-hdl:        CH7011-RIPE
remarks:        Please send all complaints about abusive use
remarks:        of our services to abuse@de.clara.net
remarks:        Bitte senden Sie alle Mails, die sich auf den Missbrauch
remarks:        (abuse) unseres Dienstes beziehen, an abuse@de.clara.net
mnt-by:         CLARANETDE-MNT
created:        2001-11-30T16:52:46Z
last-modified:  2011-04-18T08:55:43Z
source:         RIPE # Filtered

person:         Markus Bach
address:        Claranet GmbH
address:        Hanauer Landstrasse 196
address:        D-60314 Frankfurt
address:        Germany
phone:          +49 69 408018 0
fax-no:         +49 89 408018 339
nic-hdl:        MB25544-RIPE
remarks:        PGPKEY-6CBDA835
mnt-by:         CLARANETDE-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2012-04-17T10:36:19Z
source:         RIPE # Filtered

% Information related to '212.6.128.0/17AS8426'

route:          212.6.128.0/17
descr:          CLARANET-DE 8196:1 8196:100
origin:         AS8426
mnt-by:         CLARANETDE-MNT
created:        2008-04-23T11:20:25Z
last-modified:  2010-06-18T15:06:33Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.111 (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