% 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 '212.51.136.0 - 212.51.136.255'

% Abuse contact for '212.51.136.0 - 212.51.136.255' is 'abuse@init7.net'

inetnum:        212.51.136.0 - 212.51.136.255
netname:        FIBER7-780OBW-NET
descr:          Fiber7
country:        CH
admin-c:        ISHM-RIPE
tech-c:         ISHM-RIPE
status:         ASSIGNED PA
mnt-by:         MNT-INIT7-NOC
created:        2014-09-29T13:57:23Z
last-modified:  2017-04-03T14:30:41Z
source:         RIPE # Filtered

role:           Init Seven Hostmaster-Team
address:        Init7 (Switzerland) AG
address:        Technoparkstrasse 5
address:        CH-8406 Winterthur
abuse-mailbox:  abuse@init7.net
phone:          +41 44 315 44 00
fax-no:         +41 44 315 44 01
admin-c:        LIMO-RIPE
tech-c:         ISNO-RIPE
nic-hdl:        ISHM-RIPE
org:            ORG-ISA1-RIPE
mnt-by:         MNT-INIT7-NOC
created:        2003-04-29T21:01:05Z
last-modified:  2018-02-23T16:05:44Z
source:         RIPE # Filtered

% Information related to '212.51.128.0/20AS13030'

route:          212.51.128.0/20
descr:          Init7 (Switzerland) Ltd.
descr:          St. Georgen-Strasse 70
descr:          CH-8400 Winterthur
origin:         AS13030
mnt-by:         MNT-INIT7-NOC
member-of:      RS-INIT7
created:        2013-08-27T14:10:55Z
last-modified:  2013-08-27T14:10:55Z
source:         RIPE # Filtered

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