% 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 '193.146.142.160 - 193.146.142.175'

% Abuse contact for '193.146.142.160 - 193.146.142.175' is 'iris@certsi.es'

inetnum:        193.146.142.160 - 193.146.142.175
netname:        REDES
descr:          Entidad Publica Empresarial RED.ES
country:        ES
admin-c:        VRR16-RIPE
tech-c:         JAGG12-RIPE
tech-c:         LMM89-RIPE
tech-c:         JELS11-RIPE
abuse-c:        RIAC2-RIPE
status:         ASSIGNED PA
remarks:        mail spam reports: iris@certsi.es
remarks:        security incidents: iris@certsi.es
mnt-by:         REDIRIS-NMC
mnt-by:         REDES-MNT
mnt-irt:        IRT-IRIS
created:        2009-10-06T11:02:23Z
last-modified:  2021-03-02T16:31:22Z
source:         RIPE # Filtered

person:         Juan Antonio Gutierrez Gil
address:        Entidad Publica Empresarial Red.es
address:        Plaza Manuel Gomez Moreno, s/n
address:        28020 Madrid
phone:          +34 912127620
fax-no:         +34 912127635
nic-hdl:        JAGG12-RIPE
mnt-by:         REDES-MNT
created:        2019-06-24T09:35:36Z
last-modified:  2019-06-24T09:35:36Z
source:         RIPE

person:         Jose Eleuterio Lopez Sanchez
address:        Entidad Publica Empresarial Red.es
address:        Ed. Bronce; Pza. Manuel Gomez Moreno, s/n
address:        28020 Madrid
phone:          +34 912127620
nic-hdl:        JELS11-RIPE
mnt-by:         REDES-MNT
created:        2021-03-02T15:56:56Z
last-modified:  2021-03-03T08:20:11Z
source:         RIPE # Filtered

person:         Lourdes Montero Marcos
address:        Entidad Publica Empresarial Red.es.
address:        Ed. Bronce; Pza. Manuel Gomez Moreno, s/n
address:        28020 Madrid
phone:          +34 912127620
nic-hdl:        LMM89-RIPE
mnt-by:         REDES-MNT
created:        2021-03-02T16:15:16Z
last-modified:  2021-03-03T08:21:05Z
source:         RIPE # Filtered

person:         Victor Rodrigo Raya
address:        Entidad Publica Empresarial Red.es.
address:        Ed. Bronce; Pza. Manuel Gomez Moreno, s/n
address:        28020 Madrid
phone:          +34 912127620
nic-hdl:        VRR16-RIPE
mnt-by:         REDES-MNT
created:        2021-03-02T15:55:10Z
last-modified:  2021-03-02T15:55:10Z
source:         RIPE

% Information related to '193.144.0.0/14AS766'

route:          193.144.0.0/14
descr:          RedIRIS Provider Block
origin:         AS766
mnt-by:         REDIRIS-NMC
created:        1970-01-01T00:00:00Z
last-modified:  2004-07-29T09:48:00Z
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