% 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 '81.126.205.0 - 81.126.205.255'

% Abuse contact for '81.126.205.0 - 81.126.205.255' is 'abuse-ripe@telecomitalia.it'

inetnum:        81.126.205.0 - 81.126.205.255
netname:        DATACENTER
descr:          IP dedicati a Servizi Datacenter
country:        IT
admin-c:        ITR2-RIPE
tech-c:         ITR2-RIPE
abuse-c:        AT10542-RIPE
remarks:        Any abuse reports, please send them to abuse-ripe@telecomitalia.it
status:         ASSIGNED PA
mnt-by:         INTERB-MNT
mnt-by:         FULCOM-MNT-RIPE
created:        2025-01-28T08:50:19Z
last-modified:  2025-01-28T08:50:19Z
source:         RIPE

role:           IT Telecom Role
address:        Telecom Italia S.p.A.
address:        Via Negri, 1 Milano - 20123
address:        Italy
remarks:        trouble: ripe-noc@telecomitalia.it
admin-c:        NGR17-RIPE
tech-c:         NGR17-RIPE
abuse-mailbox:  abuse-ripe@telecomitalia.it
nic-hdl:        ITR2-RIPE
remarks:
remarks:        Pay attention
remarks:        Any communication sent to email different
remarks:        from the following will be ignored !
remarks:
remarks:        Any abuse and spamming reports, please
remarks:        send them to abuse-ripe@telecomitalia.it
remarks:
mnt-by:         FULCOM-MNT-RIPE
created:        2003-04-22T07:54:13Z
last-modified:  2017-11-22T08:34:13Z
source:         RIPE # Filtered

% Information related to '81.126.0.0/16AS3269'

route:          81.126.0.0/16
descr:          INTERBUSINESS
origin:         AS3269
remarks:        ************************************************
remarks:        * Pay attention *
remarks:        * Any communication sent to email different *
remarks:        * from the following will be ignored! *
remarks:        * Any abuse reports, please send them to *
remarks:        * abuse@business.telecomitalia.it *
remarks:        ************************************************
mnt-by:         INTERB-MNT
created:        2025-12-01T09:26:50Z
last-modified:  2025-12-01T09:26:50Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.120 (DEXTER)